
### Instruction: help me answer this question What is the electron configuration of Sodium and Helium?, think step by step
### Assistant: The electron configuration of an element refers to the arrangement of electrons in an atom. It is derived by following the Aufbau principle, which states that electrons occupy the lowest energy level accessible to them. , The answer is The electron configuration of Sodium is 1s² 2s² 2p⁶ 3s¹ and the electron configuration of Helium is 1s².
