Molecule - Atomicity

The smallest particle of a substance - capable of independent existence & which retains the characteristics of the substance.

State the atomicity of sulphur.

State the atomicity of argon.

State the atomicity of chlorine.

State the atomicity of oxygen.

State the atomicity of neon.

State the meaning of the term molecule with a suitable example.

A non-metal which forms a polyatomic molecule with more than three atoms.

Explain the term - 'atomicity'. Give reasons why - 

a] Helium is considered monoatomic, but hydrogen a diatomic molecule.

b] Ozone is considered triatomic, but phosphorus a tetratomic molecule.