Question

The correct arrangement of increasing order of atomic radius among Na, K, Mg, Rb is
A. `Na lt K lt Mg lt Rb`
B. `K lt Na lt Mg lt Rb`
C. `Na lt Mg lt K lt Rb`
D. `Rb lt K lt Mg lt Na`

Answer 1

Correct Answer - A
Mg belongs to group 2. Therefore, its size is less than that of Na.