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Write the sum of lone pairs of electron ...

Write the sum of lone pairs of electron on central atom of `SF_(4), CF_(4), XeF_(4), XeF_(2)` and `ClF_(3)`.

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The correct Answer is:
8
`SF_(4)(1)`
`CF_(4)(0)`
`XF_(4)(2)`
`XeF_(2)(3)`
`ClF_(3)(2)`
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