Science, asked by Anonymous, 10 months ago

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Answered by Anonymous

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element b belongs to 17th group so it has 17 electron in valence cell as it belongs to the third period it has three shells - k, l and m. Hence electronic configuration of b is k, l, that is 2,8,7. A is a metal has it has a tendency to form electropositive ion by using its valence electron .

Answered by Anonymous

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Astu cheng Ella...

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