s-Block ElementsHard

Question

Largest difference radii is found in case of the pair

Options

A.Li, Na
B.Na, K
C.K, Rb
D.Rb, Cs.

Solution

Radii of atoms increase as we go down the group due to the addition of extra energyshell. Nuclear charge also increases on moving down the group but the influence ofaddition of energy shell predominates. This predominate is larger in case when we movefrom Na K among all the options given.

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