Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test General Science Chemistry Periodic Table

Which of the following has maximum no. of unpaired electrons?

1

Zn²⁺

2

Fe²⁺

3

Ni²⁺

4

More than one of the above

5

None of the above

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