Question

Define Ionisation potential.

Answer 1

• Ionisation potential also called ionisation energy is the amount of energy required to remove an electron from an isolated atom or molecule.
• Factors affecting ionisation potential are,

1. The force of attraction between electrons and the nucleus.
2. The force of repulsion between electrons.

• In a group in the periodic table the ionisation energy decreases while moving from top to bottom.
• Across a period it increases while moving from left to right