Question

give reason why the valency of chlorine is 1

Answer 1

Answer:

Chlorine has a 3s2 3p5 electron configuration so it only needs one electron to fill its outer shells (3s and 3p). ... Generally, you'd want 8 electrons in the outer shell. The shell is the principal energy level, i.e 1,2,3 etc

Answer 2

Answer:

it is obtained from the number of electrons present in the outermost shell of an atom. the atomic number of chlorine is 17 and the electronic configuration is 2,8,7 therefore the valency of chlorine is 1 .

I hope it help you........