Among the following which have the largest ionic radii?

F^{-}

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O^{- 2}

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{N a}^{+}

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{M g}^{+ 2}

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{A l}^{+ 3}

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Solution

The correct option is B $O^{- 2}$
Ionic radius is the radius of an atom's ion.Ions may be larger or smaller than the neutral atom, depending on the ion's electric charge. When an atom loses an electron to form a cation, the other electrons are more strongly attracted to the nucleus, and the radius of the atom gets smaller. Similarly, when an electron is added to an atom, forming an anion, the added electron increases the size of the electron cloud.So Oxygen anion with $- 2$ charge has the largest ionic radii.

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Similar questions

N a^{+}, M G^{2 +}, O^{2 -}, F^{-} A l^{3 +}, N^{3 -}

N^3- , O^2- , F^- , Mg^2+ , Na^+ , Al^3+ Arrange in the increasing order of ionic radii.

O^{2 -}, F^{-}, N a^{+}, M g^{2 +}

A l^{3 +}

O^{2 -}, F^{-}, N a^{+}, M g^{2 +},

A l^{3 +}

{M g}^{2 +}, O^{2 -} {A l}^{3 +}; N^{3 -}, F^{-}, {N a}^{+}

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