which-of-the-following-is-the-correct-electron-configuration-for-a-sodium-atom

Question

Which of the following is the correct electron configuration for a sodium atom?

Accepted Answer

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

Answer

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

Answer

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

Answer

$$1s^{2}$$ $$2s^{2}$$ $$2p^{5}$$ $$3s^{2}$$