Number of valence electrons in Cl – ion are:
(a) 16 (b) 8 (c) 17 (d) 18
Answer
(b) 8
Explanation:
- Valence electrons are the electrons in the last filled shell of an atom.
- Cl has atomic number 17, therefore it has 17 electrons
- Cl - has 1 e - more than Cl , therefore it will have 18 electrons
-
Its electronic configuration is given as follows:
K Shell = 2 e -
L Shell = 8 e -
M Shell = 8 e -
- Since the valence shell(M Shell) has 8 e - , the number of valence electrons is 8.
