Correct Answer: Option A

Explanation

Transition metals have variable oxidation states because their valence electrons are in the d-orbitals with similar energies, allowing them to be used for bond formation in multiple ways. Transition metals have partially filled d-orbitals in their outer electron shell. 

There is an explanation video available below.

• what is the fluid in the eye calles? Answer this

  1 Answers   ·   Biological Science   ·   2 hours ago
• which school is the richest school in Nigeria? Answer this

  1 Answers   ·   1 day ago
• how does post utme looks like and what are the subjects required for a medical student? Answer this

  1 Answers   ·   1 day ago