Question

Bromine is in Group 7 of the Periodic Table. Each bromine atom has 7 electrons in its outer shell. Iodine is directly below bromine in the Periodic Table. How many electrons does an atom of iodine have in its outer shell?

Answer 1

Explanation:

an atom of iodine has 7 electrons in its outer shell

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Answer 2

Iodine’s atomic number is 53 and therefore has 53 electrons with no charge.

with the oxidation states: 7, 6, 5, 4, 3, 1, −1

The iodine atom can vary in the number of electrons but not the number of protons.

Electrons per shell

2, 8, 18, 18, 7

Seven electrons being the outer shell