Question

The general electronic configuration of lanthanides is

• A. $5f^{1-14}6d^{0-1}5s^2$
• B. $4f^{1-14}5d^{0-1}6s^2$
• C. $6f^{1-14}7d^{0-1}6s^2$
• D. $7f^{1-14}8d^{0-1}7s^2$

Answer 1

The correct option is B $4f^{1-14}5d^{0-1}6s^2$

The general electronic configuration of lanthanides is $4f^{1-14}5d^{0-1}6s^2$. They belong to the 6th period of a modern periodic table.