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Formal Charge

Three element...

Question

Three elements X, Y and Z have atomic numbers 11, 12 and 17 respectively. Find the sum of their electrovalency.

A

1

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B

2

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C

3

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D

4

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Solution

The correct option is D 4
To attain the nearest noble gas configuration X and Y have to lose 1 and 2 electrons respectively during the formation of the ionic bond while, Z will have to gain 1 electron for the same.
$∴$ Sum of electrovalency = 1+2+1 = 4

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