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Question

If A combines with F, what would be the formula of the resulting compound ?

A
AF
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B
AF2
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C
A2F
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D
A2F3
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Solution

The correct option is C A2F
A has configuration 1s22s1 where as F has 1s22s22p4.Here F needs 2 electrons to get stability where as A has to donate 1 electron to get stability.F always exists in diatomic that is oxygen gas.
2A+0.5F2A2O.

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