give the number of valence electrons for fluorine.
give the number of valence electrons for fluorine.
Answer
Explanation:
Step1: Recall electron - configuration concept
Valence electrons are in the outermost shell. Fluorine has an atomic number of 9. Its electron - configuration is 1s²2s²2p⁵.
Step2: Count outermost electrons
The second shell (n = 2) is the outermost shell for fluorine. In the 2s sub - shell, there are 2 electrons and in the 2p sub - shell, there are 5 electrons. So, 2 + 5=7.
Answer:
7