Question

how many valence electrons are in an atom of the element fluorine? (1 point) eight two five seven

Explanation:

Fluorine has an atomic number of 9. Its electron - configuration is 1s²2s²2p⁵. Valence electrons are electrons in the outermost shell. For fluorine, the outermost shell (n = 2) has 2 + 5=7 electrons.

Answer:

D. seven