Question

CuCI is more covalent than NaCl. Give reason.

Answer 1

1. Cations having ns² np⁶ nd¹⁰ configuration show greater polarising power than the cations with ns² np⁶ configuration. Hence they show greater covalent character.

2. CuCI is more covalent than NaCI. As compared to Na (1.13Å), Cu⁺ (0.6Å)is small and has 3s² 3p⁶ 3d¹⁰ configuration.

3. Electronic configuration of Cu : [Ar] 3d¹⁰ 

Electronic configuration of Na : [He] 2s² 2p⁶ 

So CuCI is more covalent than NaCI