Question

how many valence electrons are in a chlorine atom? 17 1 7 10 none of the above submit

Explanation:

Chlorine has an atomic number of 17. Its electron configuration is \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}\). The outermost shell (valence shell) is the third shell (\(n = 3\)) which has \(3s^{2}3p^{5}\) electrons. The number of valence electrons is calculated by adding the electrons in the outermost shell. \(2 + 5=7\).

Answer:

7