Question

What is uranium's electron configuration?

Answer 1

The electron for Uranium (U) is based upon the placement of uranium in the third column of the actinide series or f block. Therefore th electron configuration for uranium must end as $5f^3$

$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}5s^{2}4d^{10}5p^{6}6s^{2}4f^{14}5d^{10}6p^{6}7s^{2}6d^{1}5f^3$

This notation can be written in core notation or noble gas notation by replacing the $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}5s^{2}4d^{10}5p^{6}6s^{2}4f^{14}5d^{10}6p^6$ with the noble has $\left[Rn\right].$

$\left[Rn\right]7s^{2}6d^{1}5f^3$