Question

When a neutral atom is converted to the anion, its:

• A. atomic number increases
• B. atomic number decreases
• C. size increases
• D. mass number increases

Answer 1

Answer: (C)

size increases

When a neutral atom gains one (or) more electrons a negative ion called anion is formed. The radius of anion is more than that of its atom, due to decrease in effective nuclear charge.

$C{l}^{-}>Cl$