GKFix MCQ Question

What is the main reason the d-block of the periodic table has 10 columns?

• A. A maximum of 6 electrons can occupy all the orbitals in a d-subshell.
• B. A maximum of 8 electrons can occupy all the orbitals in a d-subshell.
• C. A maximum of 10 electrons can occupy all the orbitals in a d-subshell.
• D. A maximum of 14 electrons can occupy all the orbitals in a d-subshell.