Question

In halogen group which tendency works with increase in atomic number

• A. Ionic size decreases
• B. tendency to lose electrons decreases
• C. Ionisation energy decreases
• D. In MX₂ (M= metal, X= halogen) covalent character decreases

Answer 1

The correct option is C

Ionisation energy decreases

Down the group as the atomic number increases, atomic size increases. With increase in atomic size ionization energy decreases.