Question

what is the electron configuration for fluorine, f? 1s² 2s² 2p⁶ 3s² 1s² 2s² 2p⁶ 3s¹ 1s² 2s² 2p⁵ 1s² 2s² 2p⁴

Explanation:

Fluorine has an atomic number of 9, meaning it has 9 electrons. The electron configuration is built by filling orbitals in order of increasing energy. The 1s orbital holds 2 electrons, the 2s orbital holds 2 electrons, and the 2p orbital can hold up to 6 electrons. For 9 electrons: 2 go to 1s ($1s^{2}$), 2 go to 2s ($2s^{2}$), and the remaining 5 go to 2p ($2p^{5}$).

Answer:

1s² 2s² 2p⁵