Rare gas
Rare gases, also known as inert gas, blunt gas, expensive gas, refers to the elements of the periodic table on the 18 elements (IUPAC new provisions, that is, the original 0 family). At room temperature and pressure, they are all colorless and tasteless single atom gas, it is difficult to carry out chemical reaction. There are six rare earth gases, namely helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) and radioactive radon (Rn). The Uuo is a synthetic rare gas, the nucleus is very unstable, half-life is very short. According to the elemental cycle law, it is estimated that Uuo is more lively than radon. However, theoretical calculations show that it may be very lively and does not necessarily be called a rare gas. However, the carbon element exhibits similar properties to rare gases. ...