Which one of the following is the smallest cation?

$N a^{+}$

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$M g^{2 +}$

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$C a^{2 +}$

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$A l^{3 +}$

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Solution

The correct option is D
$A l^{3 +}$

The smallest ionic radius will be a function of a greater gap between the number of protons (higher number) and electrons (lower number). $A l^{3 +}$ has the highest value for (protons - electrons).

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Similar questions

Q. Arrange the following in the order given below:

Increasing polarising power of

{N a}^{+}, {C a}^{2 +}, {M g}^{2 +}, {A l}^{3 +}

is :

{C a}^{2 +} < {N a}^{+} < {M g}^{2 +} < {A l}^{3 +}

.
if true enter 1, else enter 0.

Q. Arrange the following in the decreasing order of their coagulation power:

A l^{3 +}, N a^{+}, C a^{2 +}

The charge/ size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing power of the cationic species, $K^{+}, C a^{2 +}, M g^{2 +}, B e^{2 +}$

Q. Hydration Energy of

M g^{2 +}

is lower than that of:

Q. The Hydration energy of

M g^{2 +}

is larger than that of:

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Which one of the following is the smallest cation?

The correct option is D Al3+ The smallest ionic radius will be a function of a greater gap between the number of protons (higher number) and electrons (lower number). Al3+ has the highest value for (protons - electrons).

The correct option is D
$A l^{3 +}$

The smallest ionic radius will be a function of a greater gap between the number of protons (higher number) and electrons (lower number). $A l^{3 +}$ has the highest value for (protons - electrons).