If the number of protons in X2− is 16, then the number of electrons in X2+ will be:
A
14
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B
16
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C
18
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D
Cannot be determined
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Solution
The correct option is A 14 Given:
Number of protons in X2− = 16
Number of protons remains constant.
In a neutral species,
Number of protons = number of electrons
Four electrons are removed from X2− to form X2+ and therefore the number of electrons in X2+ is =Number of electrons in X2−− Number of electrons lost/removed =18−4 =14