Chemistry, asked by VaishnaviJagdeo, 4 months ago

three elements A, B and C have 2,4 and 7 electrons respectively in their outermost shell. give the group number in which the belong in modern periodic table. also give their valencies. (asap)

Answers

Answered by bobby3455

1

Answer:

group no.

A =2

B = 4

C=7

Explanation:

Valencies -

A = +2

B = 4

C = -1

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