The atomic radii of alkali metals M lie in the order Li - Na - KA- Gradual increase in ionisation energyB- Increasing weakness of the metallic bondC- Increasing electropositive characterD- Decreasing degree of hydration

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Ionic Radii and Ionisation Enthalpy (Group 2)

The atomic ra...

Question

The atomic radii of alkali metals (M) lie in the order \(Li < Na < K

Gradual increase in ionisation energy

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Increasing weakness of the metallic bond

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Increasing electropositive character

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Decreasing degree of hydration

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Arrange the following as per instructions given in the brackets.

(a) Mg. Cl, Na, S, Si (decreasing order of atomic size)

(b) Cs, Na, Li, K, Rb (increasing metallic character)

(d) Cl, F, Br, I (increasing electron affinity)

(e) Cs, Na, Li, K, Rb (decreasing electronegativity)

L i < N a < K < R b

L i^{+} > N a^{+} > K^{+} > R b^{+}

The order of decreasing ionisation enthalpy in alkali metals is
(a) Na> Li > K> Rb (b) Rb< Na< K< Li
(c) Li > Na> K> Rb (d) K< Li < Na < Rb

H e, A r, N e

N a, L i, K

F, C l, B r

N a, K, L i

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