1.

Ln^(3+) contain

Answer»

1 to 6 4-f unpaired ELECTRONS
1 to 5 4-f unpaired electrons
1 to 7 4-f unpaired electrons
all of these

Solution :`LN^(3+)` ion has electronic congiguration `6S^(2), 4F^(1-14), 5d^(0-1)` containing 1 to 7 4f unpaired electrons.


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