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An element A has the configuration 1s^(2...

An element A has the configuration `1s^(2)2s^(2)//2p^(6)3s^(1)`and the elemen B has the configuration `1s^(2)2s^(2)2p^(4)` Give the formula of the compound formed.

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The correct Answer is:
`A_(2)B`
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