Which of the following has smallest size?

Question

Which of the following has smallest size? (A)  Mg2+  (B)  Na+  (C)  Al3+  (D)  Si4+

Tardigrade Admin · Accepted Answer

Atomic size decreases in a period from left to right. Also size decreases with increase in positive charge. Hence, among given species, Si4+ will be the smallest.

Q. Which of the following has smallest size?

$M g^{2 +}$

$N a^{+}$

$A l^{3 +}$

$S i^{4 +}$

Atomic size decreases in a period from left to right. Also size decreases with increase in positive charge. Hence, among given species, $S i^{4 +}$ will be the smallest.