In group 1 , values of the metallic radii follow the order :

Q. In group 1 , values of the metallic radii follow the order :

A

K > Rb > Cs

B

Li > Na > K

C

Na < K < Rb

D

Cs < K < Li

Solution:

Metallic radius is defined as one – half of the distance between the nuclei of two atoms in crystal or between two adjacent metal ions in the metallic lattice .
Metallic radii decreases across the period due to an increase in the effective nuclear charge .
Metallic radii increases down the group due to increase in principal quantum number .

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