Question

what is is molecule of an element? give an examples of monoatomic diatomic and triatomic molecule ​

Answer 1

Monatomic – composed of 1 atom e.g. He, Ne, Ar (all noble gases are monatomic) Diatomic – composed of 2 atoms e.g. H2 , N2 , O. Triatomic – composed of 3 atoms e.g. O. Polyatomic – composed of 3 or more atoms e.g. P4 , S.