Question

the electronic configuration of atom A is 2,8,6.

Answer 1

Hi friend
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Your answer
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ELECTRONIC CONFIGURATION OF ATOM A = 2,8,6.

THEN,
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ATOMIC NUMBER = 2+8+6 = 16

ELEMENT WITH ATOMIC NUMBER 16 = SULPHUR (S)

VALENCY = 2

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Answer 2

the atom A is Sulphur