Question

An element with atomic number 106 has been discovered recently. Which of the following electronic configuration will it posses:

• A. $\left[Rn\right]5f^{14}6d^{5}7s^1$
• B. $\left[Rn\right]5f^{14}6d^{5}7s^2$
• C. $\left[Rn\right]5f^{14}6d^{6}7s^0$
• D. $\left[Rn\right]5f^{14}6d^{1}7s^{2}7{{}_p}^3$

Answer 1

The correct option is A $\left[Rn\right]5f^{14}6d^{5}7s^1$

Seaborgium is a synthetic element with symbol Sg and atomic number $106$.

predicted electronic configuration is $\left[Rn\right]5f^{14}6d^{4}7s^2$ but due to extra stability of half-filled d orbitals it shows $\left[Rn\right]5f^{14}6d^{5}7s^1$.

Hence, option A is the correct answer.