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Which of the two ions Ca^(2+) " or " Zn^...

Which of the two ions `Ca^(2+) " or " Zn^(2+)` is more stable and why ?

Text Solution

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`Ca^(2+)` ion is more stable than `Zn^(+)`ion.
Reason : An ion with 'inert gas configuration' is more stable than an ion with 'pseudo inert gas configuration'.
`Ca^(2-)(2,8,8)` has inert gas configuration i.e., 'electron-octet' in the valence shell.
`Zn^(2+)`(2,8,8) has 18 electrons in the outermost energy level. It has pseudo inert gas configuration.
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