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Atomic Radius

Which of the ...

Question

Which of the following is arranged in order of increasing radius?

K^{+} (a q) < N a^{+} (a q) < L i^{+} (a q)

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N a^{+} (a q) < K^{+} (a q) < L i^{+} (a q)

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K^{+} (a q) < L i^{+} (a q) < N a^{+} (a q)

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L i^{+} (a q) < N a^{+} (a q) < K^{+} (a q)

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Solution

The correct option is D $L i^{+} (a q) < N a^{+} (a q) < K^{+} (a q)$
On moving down the group atomic and ionic radii increases. $L i^{+}, N a^{+} and K^{+}$ all belong to group 1. On moving top to bottom they appear in the order $L i^{+}, N a^{+} and K^{+}$ . So, $K^{+}$ has the largest ionic radii, followed by $N a^{+}$ and $L i^{+}$ being the smallest.

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Similar questions

ionic species having largest size:

A. Li+(g)

B.Na+ (aq)

C. Rb+(aq)

D. Li+(aq)

N a_{(a q)}^{+}

K_{(a q)}^{+}

r_{N a^{+} (a q)} > r_{k^{+} (a q)}

{C s}_{a q}^{+} < {R b}_{a q}^{+} < K_{a q}^{+} < {N a}_{a q}^{+}

C u

F e

E_{c e l l}^{\circ}

A g^{+}

N a^{+}, C l^{+}, A g^{+}

N O_{3}

A g C l

N a^{+} (a q) + C l (a q) + A g^{+} (a q) + N O_{3} (a q) ⇌ A g C l (s) + N a^{+} (a q) + N O_{3} (a q) Δ H = 65.9 k J

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