I element of the periodic table. What are chemical elements? System and characteristics of chemical elements

See also: List of chemical elements by atomic number and Alphabetical list of chemical elements Contents 1 Symbols currently used ... Wikipedia

See also: List of chemical elements by atomic number and List of chemical elements by symbols Alphabetical list of chemical elements. Nitrogen N Actinium Ac Aluminum Al Americium Am Argon Ar Astatine At ... Wikipedia

The periodic system of chemical elements (Mendeleev's table) is a classification of chemical elements that establishes the dependence of various properties of elements on the charge of the atomic nucleus. The system is a graphical expression of the periodic law, ... ... Wikipedia

Chemical elements (periodic table) classification of chemical elements, establishing the dependence of various properties of elements on the charge of the atomic nucleus. The system is a graphical expression of the periodic law established by the Russian ... ... Wikipedia

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Japanese-English-Russian Dictionary of Industrial Equipment Installation. About 8,000 terms, Popova I.S. The dictionary is intended for a wide range of users, and primarily for translators and technical specialists involved in the supply and implementation of industrial equipment from Japan or ...

The periodic table is one of the greatest discoveries of mankind, which made it possible to streamline knowledge about the world around us and discover new chemical elements. It is necessary for schoolchildren, as well as for everyone who is interested in chemistry. In addition, this scheme is indispensable in other areas of science.

This scheme contains all the elements known to man, and they are grouped depending on atomic mass and serial number. These characteristics affect the properties of the elements. In total, there are 8 groups in the short version of the table, the elements included in one group have very similar properties. The first group contains hydrogen, lithium, potassium, copper, the Latin pronunciation in Russian of which is cuprum. And also argentum - silver, cesium, gold - aurum and francium. The second group contains beryllium, magnesium, calcium, zinc, followed by strontium, cadmium, barium, and the group ends with mercury and radium.

The third group includes boron, aluminum, scandium, gallium, then yttrium, indium, lanthanum, and the group ends with thallium and actinium. The fourth group begins with carbon, silicon, titanium, continues with germanium, zirconium, tin, and ends with hafnium, lead, and rutherfordium. In the fifth group there are elements such as nitrogen, phosphorus, vanadium, arsenic, niobium, antimony are located below, then bismuth tantalum comes and completes the dubnium group. The sixth begins with oxygen, followed by sulfur, chromium, selenium, then molybdenum, tellurium, then tungsten, polonium and seaborgium.

In the seventh group, the first element is fluorine, followed by chlorine, manganese, bromine, technetium, followed by iodine, then rhenium, astatine and borium. The last group is the most numerous. It includes gases such as helium, neon, argon, krypton, xenon and radon. This group also includes the metals iron, cobalt, nickel, rhodium, palladium, ruthenium, osmium, iridium, platinum. Next come hannium and meitnerium. Separately located elements that form the actinide series and the lanthanide series. They have similar properties to lanthanum and actinium.

This scheme includes all types of elements, which are divided into 2 large groups - metals and non-metals with different properties. How to determine whether an element belongs to a particular group, a conditional line will help, which must be drawn from boron to astatine. It should be remembered that such a line can only be drawn in the full version of the table. All elements that are above this line and are located in the main subgroups are considered non-metals. And which are lower, in the main subgroups - metals. Also, metals are substances that are in side subgroups. There are special pictures and photos on which you can get acquainted with the position of these elements in detail. It is worth noting that those elements that are on this line exhibit the same properties of both metals and non-metals.

A separate list is also made up of amphoteric elements, which have dual properties and can form 2 types of compounds as a result of reactions. At the same time, they manifest equally both basic and acid properties. The predominance of certain properties depends on the reaction conditions and the substances with which the amphoteric element reacts.

It should be noted that this scheme in the traditional execution of good quality is color. At the same time, different colors for ease of orientation are indicated main and secondary subgroups. And also elements are grouped depending on the similarity of their properties.
However, at present, along with the color scheme, the black-and-white periodic table of Mendeleev is very common. This form is used for black and white printing. Despite the apparent complexity, working with it is just as convenient, given some of the nuances. So, in this case, it is possible to distinguish the main subgroup from the secondary one by differences in shades that are clearly visible. In addition, in the color version, elements with the presence of electrons on different layers are indicated different colors.
It is worth noting that in a single-color design it is not very difficult to navigate the scheme. For this, the information indicated in each individual cell of the element will be enough.

The exam today is the main type of test at the end of school, which means that special attention must be paid to preparing for it. Therefore, when choosing final exam in chemistry, you need to pay attention to the materials that can help in its delivery. As a rule, schoolchildren are allowed to use some tables during the exam, in particular, the periodic table in good quality. Therefore, in order for it to bring only benefit in tests, attention should be paid in advance to its structure and the study of the properties of the elements, as well as their sequence. You also need to learn use the black and white version of the table so that you don't face any difficulties in the exam.

In addition to the main table characterizing the properties of elements and their dependence on atomic mass, there are other schemes that can help in the study of chemistry. For example, there are tables of solubility and electronegativity of substances. The first one can determine how soluble a particular compound is in water at ordinary temperature. In this case, anions are located horizontally - negatively charged ions, and cations, that is, positively charged ions, are located vertically. To find out degree of solubility of one or another compound, it is necessary to find its components in the table. And at the place of their intersection there will be the necessary designation.

If it is the letter "r", then the substance is completely soluble in water under normal conditions. In the presence of the letter "m" - the substance is slightly soluble, and in the presence of the letter "n" - it almost does not dissolve. If there is a “+” sign, the compound does not form a precipitate and reacts with the solvent without residue. If a "-" sign is present, it means that such a substance does not exist. Sometimes you can also see the sign “?” in the table, then this means that the degree of solubility of this compound is not known for certain. Electronegativity of the elements can vary from 1 to 8, there is also a special table to determine this parameter.

Another useful table is the metal activity series. All metals are located in it by increasing the degree of electrochemical potential. A series of stress metals begins with lithium, ends with gold. It is believed that the more to the left a metal occupies in this row, the more active it is in chemical reactions. In this way, the most active metal Lithium is considered to be an alkaline metal. Hydrogen is also present at the end of the list of elements. It is believed that the metals that are located after it are practically inactive. Among them are elements such as copper, mercury, silver, platinum and gold.

Periodic table pictures in good quality

This scheme is one of the greatest achievements in the field of chemistry. Wherein There are many types of this table.- a short version, a long one, as well as an extra long one. The most common is the short table, and the long version of the schema is also common. It is worth noting that the short version of the scheme is not currently recommended by IUPAC for use.
Total was more than a hundred types of tables have been developed, which differ in presentation, shape, and graphical representation. They are used in various fields of science, or not used at all. Currently, new circuit configurations continue to be developed by researchers. As the main option, either a short or a long circuit in excellent quality is used.

If the periodic table seems difficult for you to understand, you are not alone! Although it can be difficult to understand its principles, learning to work with it will help in the study of natural sciences. To get started, study the structure of the table and what information can be learned from it about each chemical element. Then you can start exploring the properties of each element. And finally, using the periodic table, you can determine the number of neutrons in an atom of a particular chemical element.

Steps

Part 1

Table structure

The periodic table, or periodic table of chemical elements, begins at the top left and ends at the end of the last line of the table (bottom right). The elements in the table are arranged from left to right in ascending order of their atomic number. The atomic number tells you how many protons are in one atom. In addition, as the atomic number increases, so does the atomic mass. Thus, by the location of an element in the periodic table, you can determine its atomic mass.

As you can see, each next element contains one more proton than the element preceding it. This is obvious when you look at the atomic numbers. Atomic numbers increase by one as you move from left to right. Since the elements are arranged in groups, some table cells remain empty.

For example, the first row of the table contains hydrogen, which has atomic number 1, and helium, which has atomic number 2. However, they are on opposite ends because they belong to different groups.

Learn about groups that include elements with similar physical and chemical properties. The elements of each group are located in the corresponding vertical column. As a rule, they are indicated by the same color, which helps to identify elements with similar physical and chemical properties and predict their behavior. All elements of a particular group have the same number of electrons in the outer shell.
- Hydrogen can be attributed both to the group of alkali metals and to the group of halogens. In some tables it is indicated in both groups.
- In most cases, the groups are numbered from 1 to 18, and the numbers are placed at the top or bottom of the table. Numbers can be given in Roman (eg IA) or Arabic (eg 1A or 1) numerals.
- When moving along the column from top to bottom, they say that you are "browsing the group".
Find out why there are empty cells in the table. Elements are ordered not only according to their atomic number, but also according to groups (elements of the same group have similar physical and chemical properties). This makes it easier to understand how an element behaves. However, as the atomic number increases, elements that fall into the corresponding group are not always found, so there are empty cells in the table.
- For example, the first 3 rows have empty cells, since transition metals are found only from atomic number 21.
- Elements with atomic numbers from 57 to 102 belong to the rare earth elements, and they are usually placed in a separate subgroup in the lower right corner of the table.
Each row of the table represents a period. All elements of the same period have the same number of atomic orbitals in which electrons are located in atoms. The number of orbitals corresponds to the period number. The table contains 7 rows, that is, 7 periods.
- For example, the atoms of the elements of the first period have one orbital, and the atoms of the elements of the seventh period have 7 orbitals.
- As a rule, periods are indicated by numbers from 1 to 7 on the left of the table.
- As you move along a line from left to right, you are said to be "scanning through a period".
Learn to distinguish between metals, metalloids and non-metals. You will better understand the properties of an element if you can determine what type it belongs to. For convenience, in most tables, metals, metalloids and non-metals are indicated by different colors. Metals are on the left, and non-metals are on the right side of the table. Metalloids are located between them.

Part 2
Element designations
1. Each element is designated by one or two Latin letters. As a rule, the element symbol is shown in large letters in the center of the corresponding cell. A symbol is an abbreviated name for an element that is the same in most languages. When doing experiments and working with chemical equations, the symbols of the elements are commonly used, so it is useful to remember them.
  - Typically, element symbols are shorthand for their Latin name, although for some, especially recently discovered elements, they are derived from the common name. For example, helium is denoted by the symbol He, which is close to the common name in most languages. At the same time, iron is designated as Fe, which is an abbreviation of its Latin name.
2. Pay attention to the full name of the element, if it is given in the table. This "name" of the element is used in normal texts. For example, "helium" and "carbon" are the names of the elements. Usually, though not always, the full names of the elements are given below their chemical symbol.
  - Sometimes the names of the elements are not indicated in the table and only their chemical symbols are given.
3. Find the atomic number. Usually the atomic number of an element is located at the top of the corresponding cell, in the middle or in the corner. It can also appear below the symbol or element name. Elements have atomic numbers from 1 to 118.
  - The atomic number is always an integer.
4. Remember that the atomic number corresponds to the number of protons in an atom. All atoms of an element contain the same number of protons. Unlike electrons, the number of protons in the atoms of an element remains constant. Otherwise, another chemical element would have turned out!

Element 115 of the periodic table - moscovium - is a superheavy synthetic element with the symbol Mc and atomic number 115. It was first obtained in 2003 by a joint team of Russian and American scientists at the Joint Institute for Nuclear Research (JINR) in Dubna, Russia. In December 2015, it was recognized as one of the four new elements by the Joint Working Group of International Scientific Organizations IUPAC/IUPAP. On November 28, 2016, it was officially named after the Moscow region where JINR is located.

Characteristic

Element 115 of the periodic table is extremely radioactive: its most stable known isotope, moscovium-290, has a half-life of just 0.8 seconds. Scientists classify moscovium as an intransition metal, similar in a number of characteristics to bismuth. In the periodic table, it belongs to the transactinide elements of the p-block of the 7th period and is placed in group 15 as the heaviest pnictogen (an element of the nitrogen subgroup), although it has not been confirmed that it behaves like the heavier homologue of bismuth.

According to calculations, the element has some properties similar to lighter homologues: nitrogen, phosphorus, arsenic, antimony and bismuth. It shows several significant differences from them. To date, about 100 moscovium atoms have been synthesized, which have mass numbers from 287 to 290.

Physical properties

The valence electrons of element 115 of the periodic table muscovy are divided into three subshells: 7s (two electrons), 7p 1/2 (two electrons) and 7p 3/2 (one electron). The first two of them are relativistically stabilized and therefore behave like inert gases, while the latter are relativistically destabilized and can easily participate in chemical interactions. Thus, the primary ionization potential of moscovium should be about 5.58 eV. According to calculations, moscovium should be a dense metal due to its high atomic weight with a density of about 13.5 g/cm3.

Estimated design characteristics:

Phase: solid.
Melting point: 400°C (670°K, 750°F).
Boiling point: 1100°C (1400°K, 2000°F).
Specific heat of fusion: 5.90-5.98 kJ/mol.
Specific heat of vaporization and condensation: 138 kJ/mol.

Chemical properties

The 115th element of the periodic table is the third in the 7p series of chemical elements and is the heaviest member of group 15 in the periodic table, located below bismuth. The chemical interaction of moscovium in an aqueous solution is determined by the characteristics of the Mc + and Mc 3+ ions. The former are presumably easily hydrolyzed and form ionic bonds with halogens, cyanides, and ammonia. Moscovium (I) hydroxide (McOH), carbonate (Mc 2 CO 3), oxalate (Mc 2 C 2 O 4) and fluoride (McF) must be soluble in water. The sulfide (Mc 2 S) must be insoluble. Chloride (McCl), bromide (McBr), iodide (McI) and thiocyanate (McSCN) are poorly soluble compounds.

Moscovium (III) fluoride (McF 3) and thiozonide (McS 3) are presumably insoluble in water (similar to the corresponding bismuth compounds). While chloride (III) (McCl 3), bromide (McBr 3) and iodide (McI 3) should be readily soluble and readily hydrolyzed to form oxohalides such as McOCl and McOBr (also similar to bismuth). Moscovium(I) and (III) oxides have similar oxidation states, and their relative stability is highly dependent on which elements they interact with.

Uncertainty

Due to the fact that the 115th element of the periodic table is synthesized by a few experimentally, its exact characteristics are problematic. Scientists have to focus on theoretical calculations and compare with more stable elements that are similar in properties.

In 2011, experiments were carried out to create isotopes of nihonium, flerovium and muscovy in reactions between "accelerators" (calcium-48) and "targets" (americium-243 and plutonium-244) to study their properties. However, the "targets" included impurities of lead and bismuth and, consequently, some isotopes of bismuth and polonium were obtained in nucleon transfer reactions, which complicated the experiment. Meanwhile, the data obtained will help scientists in the future to study in more detail the heavy homologues of bismuth and polonium, such as moscovium and livermorium.

Opening

The first successful synthesis of element 115 of the periodic table was the joint work of Russian and American scientists in August 2003 at JINR in Dubna. The team led by nuclear physicist Yuri Oganesyan, in addition to domestic specialists, included colleagues from the Lawrence Livermore National Laboratory. On February 2, 2004, the researchers published information in the Physical Review that they bombarded americium-243 with calcium-48 ions at the U-400 cyclotron and obtained four atoms of a new substance (one 287 Mc nucleus and three 288 Mc nuclei). These atoms decay (decay) by emitting alpha particles to the element nihonium in about 100 milliseconds. Two heavier isotopes of moscovium, 289 Mc and 290 Mc, were discovered in 2009-2010.

Initially, IUPAC could not approve the discovery of the new element. Needed confirmation from other sources. Over the next few years, another evaluation of the later experiments was carried out, and once again the claim of the Dubna team for the discovery of the 115th element was put forward.

In August 2013, a team of researchers from the University of Lund and the Institute for Heavy Ions in Darmstadt (Germany) announced that they had repeated the 2004 experiment, confirming the results obtained in Dubna. Another confirmation was published by a team of scientists working at Berkeley in 2015. In December 2015, a joint IUPAC/IUPAP working group acknowledged the discovery of this element and gave priority to the discovery of the Russian-American team of researchers.

Name

Element 115 of the periodic table in 1979, according to the recommendation of IUPAC, it was decided to name "ununpentium" and designate it with the corresponding symbol UUP. Although the name has since been widely used for an undiscovered (but theoretically predicted) element, it has not caught on in the physics community. Most often, the substance was called that - element No. 115 or E115.

On December 30, 2015, the discovery of a new element was recognized by the International Union of Pure and Applied Chemistry. Under the new rules, discoverers have the right to propose their own name for a new substance. At first, it was supposed to name the 115th element of the periodic table "langevinium" in honor of the physicist Paul Langevin. Later, a team of scientists from Dubna, as an option, proposed the name "Muscovite" in honor of the Moscow region, where the discovery was made. In June 2016, IUPAC approved the initiative and on November 28, 2016 officially approved the name "moscovium".

Ether in the periodic table

The world ether is the substance of ANY chemical element and, therefore, of ANY substance, it is the Absolute true matter as the Universal element-forming Essence.The world ether is the source and crown of the entire genuine Periodic Table, its beginning and end, the alpha and omega of the Periodic Table of Elements of Dmitry Ivanovich Mendeleev.

In ancient philosophy, ether (aithér-Greek), along with earth, water, air and fire, is one of the five elements of being (according to Aristotle) - the fifth essence (quinta essentia - Latin), understood as the finest all-penetrating matter. At the end of the 19th century, the hypothesis of the world ether (ME), which fills the entire world space, was widely used in scientific circles. It was understood as a weightless and elastic fluid that permeates all bodies. The existence of the ether tried to explain many physical phenomena and properties.

Preface.
Mendeleev had two fundamental scientific discoveries:
1 - Discovery of the Periodic Law in the substance of chemistry,
2 - The discovery of the relationship between the substance of chemistry and the substance of Ether, namely: Ether particles form molecules, nuclei, electrons, etc., but do not participate in chemical reactions.
Ether - particles of matter with a size of ~ 10-100 meters (in fact - the "first bricks" of matter).

Data. Ether was in the original periodic table. The cell for Ether was located in the zero group with inert gases and in the zero row as the main system-forming factor for the construction of the System of chemical elements. After the death of Mendeleev, the table was distorted, removing the Ether from it and canceling the zero group, thereby hiding the fundamental discovery of the conceptual meaning.
In modern Ether tables: 1 - not visible, 2 - and not guessed (due to the lack of a zero group).

Such deliberate forgery hinders the development of the progress of civilization.
Man-made disasters (eg Chernobyl and Fukushima) would have been excluded if adequate resources had been invested in the development of a genuine periodic table in a timely manner. Concealment of conceptual knowledge is going on at the global level for the "lowering" of civilization.

Result. In schools and universities they teach a cropped periodic table.
Assessment of the situation. The periodic table without Ether is the same as humanity without children - you can live, but there will be no development and no future.
Summary. If the enemies of humanity hide knowledge, then our task is to reveal this knowledge.
Conclusion. There are fewer elements in the old periodic table and more foresight than in the modern one.
Conclusion. A new level is possible only when the information state of the society changes.

Outcome. A return to the true periodic table is no longer a scientific issue, but a political one.

What was the main political meaning of Einstein's teachings? It consisted in any way blocking access to mankind to inexhaustible natural sources of energy, which were opened by the study of the properties of the world ether. In case of success on this path, the world financial oligarchy lost power in this world, especially in the light of the retrospective of those years: the Rockefellers made an unthinkable fortune that exceeded the budget of the United States on oil speculation, and the loss of the role of oil, which was occupied by "black gold" in this world - the role of the blood of the world economy - did not inspire them.

This did not inspire other oligarchs - coal and steel kings. So the financial tycoon Morgan immediately stopped funding the experiments of Nikola Tesla, when he came close to the wireless transmission of energy and the extraction of energy "out of nowhere" - from the world ether. After that, no one provided financial assistance to the owner of a huge number of technical solutions embodied in practice - solidarity among financial tycoons as thieves in law and a phenomenal sense of where the danger comes from. That is why against humanity and a sabotage called "The Special Theory of Relativity" was carried out.

One of the first blows fell on Dmitri Mendeleev's table, in which the ether was the first number, it was reflections on the ether that gave rise to Mendeleev's brilliant insight - his periodic table of elements.

Chapter from the article: V.G. Rodionov. The place and role of the world ether in the true table of D.I. Mendeleev

6. Argumentum ad rem

What is now presented in schools and universities under the name "Periodic Table of Chemical Elements of D.I. Mendeleev, ”is an outright fake.

The last time, in an undistorted form, the real Periodic Table saw the light in 1906 in St. Petersburg (textbook "Fundamentals of Chemistry", VIII edition). And only after 96 years of oblivion, the real Periodic Table rises from the ashes for the first time thanks to the publication of a dissertation in the ZhRFM journal of the Russian Physical Society.

After the sudden death of D. I. Mendeleev and the death of his faithful scientific colleagues in the Russian Physical-Chemical Society, for the first time he raised his hand to the immortal creation of Mendeleev - the son of a friend and colleague of D. I. Mendeleev in the Society - Boris Nikolaevich Menshutkin. Of course, Menshutkin did not act alone - he only carried out the order. After all, the new paradigm of relativism required the rejection of the idea of the world ether; and therefore this requirement was elevated to the rank of dogma, and the work of D. I. Mendeleev was falsified.

The main distortion of the Table is the transfer of the "zero group" of the Table to its end, to the right, and the introduction of the so-called. "periods". We emphasize that such a (only at first glance - harmless) manipulation is logically explicable only as a conscious elimination of the main methodological link in Mendeleev's discovery: the periodic system of elements at its beginning, source, i.e. in the upper left corner of the Table, should have a zero group and a zero row, where the element “X” is located (according to Mendeleev - “Newtonium”), i.e. world broadcast.
Moreover, being the only backbone element of the entire Table of derived elements, this element "X" is the argument of the entire Periodic Table. The transfer of the zero group of the Table to its end destroys the very idea of \u200b\u200bthis fundamental principle of the entire system of elements according to Mendeleev.

To confirm the above, let's give the floor to D. I. Mendeleev himself.

“... If the analogues of argon do not give compounds at all, then it is obvious that it is impossible to include any of the groups of previously known elements, and for them a special group zero must be opened ... This position of argon analogues in the zero group is a strictly logical consequence of understanding the periodic law, and therefore (the placement in group VIII is clearly not correct) was accepted not only by me, but also by Braisner, Piccini and others ... Now, when it has become beyond the slightest doubt that there is a zero group in front of that I group, in which hydrogen should be placed, representatives of which have atomic weights less than those of the elements of group I, it seems to me impossible to deny the existence of elements lighter than hydrogen.

Of these, let us first pay attention to the element of the first row of the 1st group. Let's denote it by "y". He, obviously, will belong to the fundamental properties of argon gases ... "Koroniy", with a density of the order of 0.2 relative to hydrogen; and it cannot by any means be the world ether.

This element "y", however, is necessary in order to mentally get close to that most important, and therefore the most rapidly moving element "x", which, in my opinion, can be considered ether. I would like to call it "Newtonium" in honor of the immortal Newton... The problem of gravitation and the problem of all energy (!!! - V. Rodionov) cannot be imagined to be really solved without a real understanding of the ether as a world medium that transmits energy over distances. A real understanding of the ether cannot be achieved by ignoring its chemistry and not considering it an elementary substance; elementary substances are now inconceivable without subjecting them to periodic law” (“An attempt at a chemical understanding of the world ether”, 1905, p. 27).

“These elements, in terms of their atomic weights, occupied an exact place between the halides and the alkali metals, as shown by Ramsay in 1900. From these elements it is necessary to form a special zero group, which was first recognized in 1900 by Herrere in Belgium. I consider it useful to add here that, judging directly by the inability to combine elements of the zero group, analogues of argon should be put before the elements of group 1 and, in the spirit of the periodic system, expect for them a lower atomic weight than for alkali metals.

This is how it turned out. And if so, then this circumstance, on the one hand, serves as a confirmation of the correctness of the periodic principles, and on the other hand, clearly shows the relationship of analogues of argon to other previously known elements. As a result, it is possible to apply the principles being analyzed even more widely than before, and wait for elements of the zero row with atomic weights much lower than those of hydrogen.

Thus, it can be shown that in the first row, first before hydrogen, there is an element of the zero group with an atomic weight of 0.4 (perhaps this is Yong's coronium), and in the zero row, in the zero group, there is a limiting element with a negligibly small atomic weight, not capable of chemical interactions and possessing, as a result, an extremely fast own partial (gas) motion.

These properties, perhaps, should be attributed to the atoms of the all-penetrating (!!! - V. Rodionov) world ether. The thought of this is indicated by me in the preface to this edition and in a Russian journal article of 1902 ... ”(“ Fundamentals of Chemistry. VIII ed., 1906, p. 613 et seq.)
1 , , ,

From the comments:

For chemistry, the modern periodic table of elements is sufficient.

The role of the ether can be useful in nuclear reactions, but even this is too insignificant.
Accounting for the influence of the ether is closest in the phenomena of isotope decay. However, this accounting is extremely complex and the existence of regularities is not accepted by all scientists.

The simplest proof of the existence of an ether: The phenomenon of annihilation of a positron-electron pair and the emergence of this pair from vacuum, as well as the impossibility of catching an electron at rest. So is the electromagnetic field and the complete analogy between photons in vacuum and sound waves - phonons in crystals.

Ether is a differentiated matter, so to speak, atoms in a disassembled state, or more correctly, elementary particles from which future atoms are formed. Therefore, it has no place in the periodic table, since the logic of building this system does not imply including in its composition non-integral structures, which are the atoms themselves. Otherwise, it is possible to find a place for quarks, somewhere in the minus first period.
The ether itself has a more complex multi-level structure of manifestation in world existence than modern science knows about it. As soon as she reveals the first secrets of this elusive ether, then new engines will be invented for all kinds of machines on absolutely new principles.
Indeed, Tesla was perhaps the only one who was close to unraveling the mystery of the so-called ether, but he was deliberately prevented from carrying out his plans. So, until today, that genius has not yet been born who will continue the work of the great inventor and tell us all what the mysterious ether really is and what pedestal it can be placed on.