Which among the following elements has the largest atomic radii?
A. Na
B. Mg
C. K
D. Ca
Answer:C
Which among the following elements has the largest atomic radii?
A. Na B. Mg C. K D. Ca
Explanation: Na and Mg belong to the same period, whereas Na and K are in the same group. In a group from top to bottom, the atomic radius increases, whereas it decreases in a period from left to right. Hence, the order would be K > Na > Mg and K > Ca > Mg.