The electronic configuration of an element is [Ar]4s1 find the group and period of this elem ent
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group - 1st ; period - 4 th , the element is potassium K
Explanation:
1st group elements i.e, alkaline metals haveone valency electron in their outer s orbital S1 and the principal number n gives the period number i.e, 4 .... ns1 where n=4
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