Question

Which among the following is a transition metal?

• A. Sodium
• B. Potassium
• C. Magnesium
• D. Copper

Answer 1

The correct option is D

Copper

Explanation for correct option

(D)Copper

Transition metals:

• The transition metals consist of partially or completely filled d subshells.
• They are good conductors of heat and electricity.
• Copper is a transition metal or d-block element.
• The electronic configuration of copper is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^1$.

Hence, copper is a transition metal.

Explanation for incorrect option

• Sodium is an alkali metal. Hence, option (A) is incorrect.
• Potassium is an alkali metal. Hence, option (B) is incorrect.
• Magnesium is an alkali earth metal. Hence, option (C) is incorrect.

Hence, option (D) is correct. Copper is a transition metal.