Question

Compared to the parent atom, the size of its anion is larger. It is because:

• A. the effective nuclear charge is less in anion
• B. the poor screening effect of electronic shells
• C. the effective nuclear charge is more in anion
• D. the greater penetration power of electrons.

Answer 1

Answer: (A)

the effective nuclear charge is less in anion

Size is inversely proportional to effective nuclear charge. Effective nuclear charge experienced by electrons of anion is less than that of neutral atom . Thus size of anion is greater than that of neutral atom.