Chemistry (Year 12)
Atomic Structure
What is the electron configuration of a chlorine atom (Cl, atomic number 17)?
1s² 2s² 2p⁶ 3s² 3p⁵
1s² 2s² 2p⁶ 3s² 3p⁶
1s² 2s² 2p⁶ 3s² 4s²
1s² 2s² 2p⁶ 3s² 3p⁴