Question

Magnetic moment of a 3d series element A is 4.92BM if magnetic moment of A2+ is also
4.92 BM then what is the group number of A in modern periodic table (according to IUPAC convention)

Answer 1

Answer:

4.92 m means 4 unpaired electrons.

and a+2 also 4.92 means 2 valence shell electrons

so outer shell configuration will be 3d4 4s2

I.e.group6

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