Question

Among the following elements which has the largest atomic size?

• A. Magnesium
• B. Phosphorus
• C. Silicon
• D. Chlorine

Answer 1

The correct option is A Magnesium

Atomic size increases down the group as the new shell is added successively while this atomic size decreases across the period. $Mg$ is an alkaline earth metal present in group $2$ while others are present on extreme right so $Mg$ has the largest size.