Question

The electrons which take part in order to exhibit variable oxidation states by transition metals are:

• A. ns only
• B. ns and (n-1)d only but not np
• C. (n-1)d only
• D. (n-1)d and np only but not ns

Answer 1

The correct option is B

ns and (n-1)d only but not np

Due to small energy difference between ns and (n-1)d orbitals, they participate in most bond formations in transition elements.