Chemistry, asked by poojasunil1012, 9 months ago

The element X in group17 has 3 shells.Write the period number

3
4
2
1
plz help me it's urgent

Answers

Answered by kaurgurveen211

0

Answer:

3 ..hope it helps!

Explanation:

no. of period = no of valence shells and number of valence electron = no. of group..

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