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Number of species that are isoelectronic...

Number of species that are isoelectronics with `Sr^(2+)` ion are four.

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The correct Answer is:
F
False. `Sr(Z=38), Sr^(2+) = 38-2=36 e^(-1)s`.
So, the number of species with `36 e^(-1)s` are only three.
1. `Br^(ɵ)(35+1=36)` , 2. `Kr(Z=36)`
3. `Rb^(1+)(37-1=36)`
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