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An element, E, has the electronic configuration 1s2

An element, E, has the electronic configuration 1s22s22p63s2p3. The reaction of E with a halogen X can give?

A.

EX3 and EX5

B.

EX3 only

C.

EX5 only

D.

EX2 and EX3

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Correct answer is A

No explanation has been provided for this answer.

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