How many inner shell electrons does an iodine atom contain?

46 inner shell electrons

Explanation:

Iodine is a chemical element that belongs to the group 17 and period 5 of the periodic table. It is p-block element that has atomic number 53.

The ground state electronic configuration of iodine is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁵.

There are 7 valence shell electrons and 46 inner shell electrons in the ground state of iodine.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8