Which of the following has smallest size?

Question

Which of the following has smallest size? (A)  Mg2+  (B)  Si4+  (C)  Al3+  (D)  P3-

Tardigrade Admin · Accepted Answer

P3- is larger in size than all other ions due to having more shell than these. All other species are isoelectronic, hence the ion having higher nuclear charge will have smaller size. Hence, Si4+ (nuclear charge = 14) is smallest in size among these.

Q. Which of the following has smallest size?

$M g^{2 +}$

$S i^{4 +}$

$A l^{3 +}$

$P^{3 -}$

$P^{3 -}$ is larger in size than all other ions due to having more shell than these. All other species are isoelectronic, hence the ion having higher nuclear charge will have smaller size. Hence, $S i^{4 +}$ (nuclear charge = 14) is smallest in size among these.

Q. Which of the following has smallest size?

Mg2+

Si4+

Al3+

P3−

P3− is larger in size than all other ions due to having more shell than these. All other species are isoelectronic, hence the ion having higher nuclear charge will have smaller size. Hence, Si4+ (nuclear charge = 14) is smallest in size among these.

$M g^{2 +}$

$S i^{4 +}$

$A l^{3 +}$

$P^{3 -}$

$P^{3 -}$ is larger in size than all other ions due to having more shell than these. All other species are isoelectronic, hence the ion having higher nuclear charge will have smaller size. Hence, $S i^{4 +}$ (nuclear charge = 14) is smallest in size among these.