Empirical Formula

It is the formula of a molecule that contains the least possible ratio of atoms.

Radical

An atom or group of atoms can exist independently with charges and are formed by loss or gain of electrons.

Equation

An equation represents a chemical reaction in which there are the reactants and products in symbolic form.

Symbol (Chemistry)

It is the shortest form of an element which represents the number of atoms in that.

ION

An atom or group of atoms that can exist independently with a charge is called an “ION”.

                                           (Or)

Loss or Gain of electrons

MOLECULE

These are the smallest particles of a matter which exists independently.