Question

Which one of the following is correct for all elements from $Sc$ to $Cu$ ?

• A. The lowest oxidation state shown by them is +2
• B. 4 S orbital is completely filled in the ground state
• C. 3 d orbital is not completely filled in the ground state
• D. The ions in +2 oxidation states are paramagnetic

Answer 1

Answer: (D)

The ions in +2 oxidation states are paramagnetic

Answer 2

Paramagnetism is due to the presence of one or more unpaired electrons