The history of the discovery of rare gases, what are the rare gases

Argon, non-metallic element, element symbol ar. The elemental substance is a colorless, odorless and tasteless gas. It is one of the most abundant noble gases in the air, and argon is the earliest rare gas found in nature due to its large content in nature.

Chemically inactive, argon cannot be burned or combustible to support combustion.

Summary. There are seven noble gases, helium (He), neon (Ne), argon (Ar), krypton (KR), xenon (XE), radon (RN, radioactive), and gas (OG, radioactive). Also known as inert gas.

There are seven kinds of rare gases, helium (He), neon (Ne), argon (Ar), krypton (Krypton), xenon (Xe), radon (Rn, radioactive masking), and gas (OG, radioactivity). Also known as inert gas.

(1) Properties of noble gases: they are all colorless and odorless gases, which are very inactive and difficult to react chemically with other substances, and were once called noble gases. (2) Uses of noble gases:

Due to its inactive nature, it is often used as a protective stove gas, and the oxygen is isolated with rare gas to prevent oxidation when welding metal; The bulb is filled with rare gases to prolong its service life; Because the noble gas can emit different colors of light when it is energized, it can be made into a variety of electric light sources, such as navigation lights, limb strong lights, flash lights, neon lights, etc.; Noble gases can be used in laser technology.

There are seven kinds of noble gases, helium (He), neon (Ne), argon (Zhenqing Hall), krypton (Krypton), xenon (Xe), radon (RN, radioactive), and gas (OG, radioactivity). Among them, OG is a rare gas synthesized artificially, and the nucleus is very unstable, with a short half-life of only 5 milliseconds.

Noble gases are colorless, odorless, tasteless, slightly soluble in water, and the solubility increases with the increase of molecular weight. The molecules of noble gases are all made up of single atoms, and they have low melting and boiling points, and as the atomic weight increases, the melting and boiling points increase. They can both liquefy at low temperatures.

Noble gasescompounds

In the atoms of noble gas elements, the arrangement of electrons in the various electron shells reaches just a stable number. Therefore, it is not easy for atoms to lose or gain hidden electrons, and it is difficult for them to chemically react with other substances, so these elements are called "noble gas elements".

Among noble gas atoms with larger atomic weights and more electrons, the outermost electrons are farther away from the nucleus and are less bound by slippage. If you encounter other atoms that attract strong electrons, these outermost electrons are lost, resulting in a chemical reaction.

The above content reference: Encyclopedia - Noble Gases.

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The noble gases include six elements, including helium (He), neon (Ne), argon (Ar), krypton (KR), xenon (Xe) and the radioactive element radon (RN), which belong to the periodic zero group. It is mainly found in the air. The amount (in volume) in the air is helium, neon, argon, krypton, xenon, and radon is a product of radium decay, with an average lifespan of only a few days.

The content of its cracks in the air is very low, and they are all gases, so they are called rare and quiet gases. Liquid air is an important raw material for the production of noble gases. Noble gases have no color or smell.

The outermost electron shell of their atoms has a stable structure and is chemically inactive, so they have long been called noble gases. Since 1962, when Neil Bartlett first synthesized XE [PTF6], hundreds of noble gas compounds have been synthesized. These facts show that noble gases are not "inert" and are therefore renamed noble gases.

Rare gases are mainly used as shielding gases for smelting and welding rare metals, and for the manufacture of various electric light sources. Helium can be made into "artificial air" for divers to breathe. The application of noble gases in lasers has also attracted more and more attention.