Final answer:
The electron configuration for fluorine (atomic number = 9) is 1s² 2s² 2p⁵.
Step-by-step explanation:
The electron configuration for fluorine (atomic number = 9) can be written as 1s² 2s² 2p⁵.
Fluorine has nine electrons, two of which are in the 1s energy level, and the remaining seven are distributed in the 2s and 2p energy levels. The 2s sublevel has two electrons, while the 2p sublevel has five.
The electron configuration represents the arrangement of electrons in an atom's energy levels and sublevels, indicating the number of electrons in each shell and orbital.