identify-which-has-an-incorrect-ground-state-electron-configuration-a-xe-kr-4d10

Question

Identify which has an incorrect ground-state electron configuration.

Accepted Answer

Tc: [Kr] $$3d^{7}$$

Answer

Xe: [Kr] $$4d^{10}$$ $$5s^{2}$$ $$5p^{6}$$

Answer

Cd: [Kr] $$4d^{10}$$ $$5s^{2}$$

Answer

Sr: [Kr] $$4s^{2}$$

Answer

Na: $$1s^{2}$$ $$2s^{2}$$ $$2p^{6}$$ $$3s^{1}$$