Ions and the Octet Rule

9. Electrons in Atoms and the Periodic Table / Ions and the Octet Rule / Problem 3

Problem 3

What is the electron configuration of a sodium ion (Na⁺)?

1s² 2s² 2p⁵

1s² 2s² 2p⁶ 3s²

1s² 2s² 2p⁶

1s² 2s² 2p⁶ 3s¹

What is the electron configuration of a sodium ion (Na+)?