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.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.