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According to molecular theory, the species among the following that does not exist is:

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According to molecular theory, the species among the following that does not exist is:

(1) He2+

(2) He2– 

(3) Be2 

(4) O22-

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1 Answer

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by (26.8k points)

(3) Be2 

   Chemical Species        Bond Order
He-+ 0.5
He-2 0.5
Be2 0
O2-2 1

According to M.O.T. If bond order of chemical species is zero then that chemical species does not exist.

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