Answers

2016-03-13T16:56:08+05:30
This is because Lithium and potassium have same physical and chemical properties, valency, outermost orbits' electronic configuration(ns1) and are called alkali metals.
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2016-03-13T16:59:51+05:30

Bcz electronic configuration of lithium is 2,1 and that of potassium is 2,7. Both have valency=1 . Even both of them are alkali metals with same chemical properties

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