Question

Highest polarizing power among Na+ Ca2+ Mg2+ Al3+

Answer 1

Answer: Option (d) is the correct answer.

Explanation:

When a cation is able to distort an anion then it is known as polarizing power.

The smaller is the size of a cation, the more better it can hold the protons in its nucleus. As a result, the attraction between nucleus and electrons will be strong. Hence, there will be shrinkage in size.

Since, $Na^{+}, Mg^{2+}, Al^{3+}$ all belong to the same period.

Each of them has a total of 10 electrons but different number of protons. Also, it is known that size of atoms decreases on moving from left to right. Therefore, aluminium will be smallest of all.

Whereas $Ca^{2+}$ is larger in size as compared to the other molecules given in the options. Therefore, it will have the least polarizing power.

Thus, we can conclude that $Al^{3+}$ has the highest polarizing power.

Answer 2

Answer:

AI3+

Explanation: