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Trends in Modern Periodic Table

53. differenc...

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53. difference in atomic radius is maximum for(a) Rb-Cs(b) K-Rb(c)Na-K(d) Li-Na Explain with reason

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The correct arrangement of increasing order of atomic radius among Na, K, Mg, Rb is:

Q. The correct order of atomic radii for the following species is

N a, L i, R b,

K

Q. Atomic radii of alkali metals (M) follow the order

L i < N a < K < R b

but ionic radii in aqueous solutions follow the reverse order

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

The reason for the reverse order is :

Q. Which ranks the following atoms

(L i, N a, K, R b)

from the smallest to largest atomic radius?

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

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