Question

Calculate the valency of charged chlorine ion

Answer 1

Answer:-

7 valence electrons in chlorINE

8 valence electrons in chlorIde

Valence electrons are on the highest energy level when you look at the electron configuration.

Chlorine is 1s2, 2s2, 2p6, 3s2, 3p5. Energy level 3 is highest, so 2+5 = 7. valence electrons in chlorine.

Chloride is the ion formed when chlorine gains one electron. It will go into 3p, so the new configuration is 1s2, 2s2, 2p6, 3s2, 3p6. So 2+6= 8 valence electrons in chloride.