Chemistry, asked by debaniksingha302, 3 months ago

P Q R S are four elements having 7 valance electrons each
1.which group do they belong
2.if P is the first element in the group and R be the third then identify P and R
3.give name of this element

Answers

Answered by Gurseerat1406

0

Answer:

1)They all belong to group 17 ,ie . halogens

2)P- fluorine(electronic configuration 2,7)

R- bromine(electronic configuration 2,8,8,7)

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