Chemistry, asked by sudharsan118, 7 months ago

can anyone answer the above question

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Answered by gunjanphogat0203

0

Answer:

sorry I acn not give answer of this

Answered by zeel12

2

Answer:

may be element B and D are same ...

Explanation:

both having same valence electron..

A is Magnesium

B is nittogen

C is calcium

D is sulphur

.. for B 1s2 2s2 2p3

and for D 1s2 2s2 2p6 3s2 3p3...

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