Current location：What is rare gas? What are the rare gases?
1103, 2023
We all know that rare gases include helium, neon, argon, krypton, xenon, radon. At room temperature, the rare gas of the elemental gas, and in addition to argon, the remaining several in the atmosphere content is very small (especially helium), so named "rare gas".
Historically, rare gases have been called "inert gases" because of their atomic outermost electron configuration in addition to helium for 1s2 (superscript), the rest are 8 electrons (ns2np6, are superscript ), And both configurations are stable structures. Therefore, the chemical properties of rare gases are very lively, so in the past people have thought that they and other elements will not occur between the chemical reaction, called "inert gas." However, it is this absolute concept that binds people's minds and hinders the study of rare gas compounds. In 1962, the 26-year-old British young chemist N worked in Canada. Bartlett synthesized the first rare gas compound Xe [PtF6] (6 subscript), which attracted much interest and attention from the chemical industry. Many chemists competing to carry out this work, has successively synthesized a variety of "rare gas compounds", to promote the development of rare gas chemistry. And "inert gas" is no longer a fact, it was renamed rare gas.
Physical and chemical properties of rare gases
The air contains about 1% (volume percent) of rare gases, the vast majority of which are argon. Rare gases are colorless, odorless, tasteless, slightly soluble in water, and the solubility increases with increasing molecular weight. Rare gas molecules are composed of single atoms, their melting point and boiling point are very low, with the increase in atomic weight, melting point and boiling point increases. They can be liquefied at low temperatures. The outermost electron structure of rare gas atoms is ns2np6 (helium is 1s2), which is the most stable structure. Therefore, it is not known to be a very chemically active and non-reactive compound because it does not act with other elements under normal conditions. Inert elements. Until 1962, the British chemist N. Baltic used the strong oxidant PtF6 and xenon to produce the first inert gas compound Xe [PtF6], and later synthesized other inert gas compounds, and its name changed to rare gas.
Air is the main raw material for the preparation of rare gases, through the liquid air fractionation distillation, available rare gas mixture, and then activated carbon adsorption method at low temperature, you can separate the rare gas.
Historically, rare gases have been called "inert gases" because of their atomic outermost electron configuration in addition to helium for 1s2 (superscript), the rest are 8 electrons (ns2np6, are superscript ), And both configurations are stable structures. Therefore, the chemical properties of rare gases are very lively, so in the past people have thought that they and other elements will not occur between the chemical reaction, called "inert gas." However, it is this absolute concept that binds people's minds and hinders the study of rare gas compounds. In 1962, the 26-year-old British young chemist N worked in Canada. Bartlett synthesized the first rare gas compound Xe [PtF6] (6 subscript), which attracted much interest and attention from the chemical industry. Many chemists competing to carry out this work, has successively synthesized a variety of "rare gas compounds", to promote the development of rare gas chemistry. And "inert gas" is no longer a fact, it was renamed rare gas.
Physical and chemical properties of rare gases
The air contains about 1% (volume percent) of rare gases, the vast majority of which are argon. Rare gases are colorless, odorless, tasteless, slightly soluble in water, and the solubility increases with increasing molecular weight. Rare gas molecules are composed of single atoms, their melting point and boiling point are very low, with the increase in atomic weight, melting point and boiling point increases. They can be liquefied at low temperatures. The outermost electron structure of rare gas atoms is ns2np6 (helium is 1s2), which is the most stable structure. Therefore, it is not known to be a very chemically active and non-reactive compound because it does not act with other elements under normal conditions. Inert elements. Until 1962, the British chemist N. Baltic used the strong oxidant PtF6 and xenon to produce the first inert gas compound Xe [PtF6], and later synthesized other inert gas compounds, and its name changed to rare gas.
Air is the main raw material for the preparation of rare gases, through the liquid air fractionation distillation, available rare gas mixture, and then activated carbon adsorption method at low temperature, you can separate the rare gas.