1.

Two elements A and B have the following electronic configurations. The formula of the compound formed between them can be A=1s^2 2s^2 2p^6 3s^2 3p^1 , B=1s^2 2s^2 2p^4

Answer»

AB
`AB_2`
`A_2B_3`
`A_3B_2`

ANSWER :C


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