At normal temperature and pressure it is a gas.
There are three natural isotopes.
Ar
Argon is typically found in a gaseous phase. Part of the noble gas family (aka inert gases), argon makes up about 0.9% of the earth's atmosphere.
It is 87.3 K.
reverse phase
Argon is a non metal element. Atomic mass of it is 39.94.
Helium, Xenon, Neon, Krypton, and Radon.
For most people there is absolutely no reason to buy any argon in their lifetimes.
Radon is a natural radioactive gas.
phase controlled RECTIFIER circuit used Natural Commutation......
recession
Argon is very unreactive as it is a noble gas. Its common oxidation number is zero.