Question

Elements upto atomic number 103 have been synthesized and studied. If a newly discovered element is found to have an atomic number 106, its electronic configuration will be:

• A. $\left[Rn\right]5f^{14},6d^4,7s^2$
• B. $\left[Rn\right]5f^{14},6d^1,7s^{2}7p^3$
• C. $\left[Rn\right]5f^{14},6d^6,7s^0$
• D. $\left[Rn\right]5f^{14},6d^5,7s^1$

Answer 1

The correct option is A $\left[Rn\right]5f^{14},6d^4,7s^2$

A element with atomic number 106 will be in period 7 and group 6 so, its electronic configuration is $\left[Rn\right]5f^{14}6d^{4}7s^2$.