The atomic radii of alkaline earth metals are smaller than those of the corresponding alkali metals. Explain, why?

Options

A. If both `(A)` and `(R )` are correct and `(R )` is the correct explanation of `(A)`.
B. If both `(A)` and `(R )` are correct, but `(R )` is not the correct explanation of `(A)`.
C. If `(A)` is correct, but `(R )` is incorrect.
D. If `(A)` is incrrect, but `(R )` is correct.

Answer

C

Explanation

Correct reason: Metallic bonding is stronger in alkaline earth metals as compared to alkali metals.