the elements Li ( z=3) ,Na(z=11) and K(z=19) belong to group 1.
(I) predict the period they belong .
(ii) which one of them is least reactive
(iii) which one of them atomic radius ?give reason to justify
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(1) Li) second period
Na) third period
K) fourth period
(2) Li is the least reactive
(3) K has higher atomic radius because as we move downwards in a group,the atomic radius increases due to increase in their shells
Na) third period
K) fourth period
(2) Li is the least reactive
(3) K has higher atomic radius because as we move downwards in a group,the atomic radius increases due to increase in their shells
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