Question

what electron configuration matches an oxygen atom? 1s²2s²2p⁶3s² 1s²2s²2p⁶3s²3p⁶4s² 1s²2s²2p⁴ 1s²2s²2p⁶

Explanation:

Oxygen has an atomic number of 8, meaning it has 8 electrons. Electrons fill orbitals in the order 1s, 2s, 2p etc. The 1s orbital can hold 2 electrons, the 2s orbital can hold 2 electrons, and the 2p orbital can hold 6 electrons. For 8 electrons, the configuration is 1s²2s²2p⁴.

Answer:

1s²2s²2p⁴