The octet rule applies to the elements of the main group but not to transition metals. Explain.

• A. The octet rule does not apply to transition metals because they have a greater metallic character that can accept more electrons.
• B. The octet rule does not apply to transition metals because they have a large molar mass that can expand of their valence orbital.
• C. The octet rule does not apply to transition metals because they have partially filled d orbitals that can accommodate additional electrons.
• D. The octet rule does not apply to transition metals because they more orbitals that produces more space for electrons.

Answer: (C)