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is sr2+ paramagnetic or diamagnetic? please tell me the reason also

is sr2+ paramagnetic or diamagnetic?
please tell me the reason also

Grade:11

1 Answers

Bhavya
askIITians Faculty 1281 Points
6 years ago
Sr+2 is diamagnetic.
The atomic number of Sr is 38.So we can write its Electronic configuration (E.C.) as :
Sr = [Kr]5s2

Now,when we have Sr+2 ion that means the new E.C. becomes
Sr+2 = [Kr] 5s0
Since Kr is noble gas hence there will be no unpaired electron and that’s why Sr+2 is diamagnetic.

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