Question

choose the correct electron configuration for chlorine (cl). 1s² 2s² 2p⁶ 3s² 3p⁵ 1s² 2s² 2p⁶ 3s² 1s² 2s² 2p¹

Explanation:

Chlorine has an atomic number of 17. Electrons fill orbitals in the order 1s, 2s, 2p, 3s, 3p etc. The 1s orbital can hold 2 electrons, 2s can hold 2, 2p can hold 6, 3s can hold 2 and 3p can hold up to 6. For chlorine with 17 electrons, the electron - configuration is 1s²2s²2p⁶3s²3p⁵.

Answer:

1s² 2s² 2p⁶ 3s² 3p⁵