Question

complete the statement by entering a number. a neutral cl atom has valence electron(s).

Explanation:

Step1: Recall chlorine's electron - configuration

Chlorine (Cl) has atomic number 17. Its electron - configuration is 1s²2s²2p⁶3s²3p⁵.

Step2: Identify valence electrons

Valence electrons are in the outermost shell. For Cl, the outermost shell is the third shell (n = 3), and it has 2 + 5=7 electrons.

Answer:

7