The element argon was discovered in 1894.
Argon. It is an element.
Argon's an element.
argon
argon is not a compound it is an element
Argon is an element - it has no constituents.
Argon is an element and all the atoms in argon are argon atoms.
Argon is a natural element found in the air.
Argon is a gas element. atomic number of it is 18.
Argon is a noble gas.
Argon is an element of the periodic table.
Argon is a chemical gaseous element.