Question

Which one of the following is an electronic configuration of thorium?

• A. $\left[Rn\right]5f^{2}6d^{0}7s^2$
• B. $\left[Rn\right]5f^{1}6d^{1}7s^2$
• C. $\left[Rn\right]5f^{0}6d^{2}7s^2$
• D. $\left[Rn\right]5f^{2}6d^{2}7s^2$

Answer 1

Answer: (C)

Thorium $\left(Z=90\right)$ have $\left[Rn\right]5f^{0}6d^{2}7s^2$ configuration.