A chemical element is found at row 5, column 7 on the periodic table, discovered in 1811. It has an atomic mass of 126.9 and a proton number of 53. Therefore the atom of iodine has 53 electrons in the follwing configuration- 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p5 (Kr 4d10 5s2 5p5).
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Explanation:
A chemical element is found at row 5, column 7 on the periodic table, discovered in 1811. It has an atomic mass of 126.9 and a proton number of 53. Therefore the atom of iodine has 53 electrons in the follwing configuration- 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p5 (Kr 4d10 5s2 5p5).