14. Justify the following observations using Coulomb’s Law.

Kr has a  smaller atomic radius than Se.

Kr has a smaller radius than Se b/c it has more filled valence orbitals and the electrons cling closer to the nucleus.

Bromine has a larger atomic radius than Chlorine.

Bromine has a larger atomic radius than Cl b/c it has another whole level of electrons, making it bigger and the Electronegativity is less (meaningg the electrons are more loosely bound)

Silicon has a higher first ionization energy than aluminum.

Silicon has a higher ionization energy than Al b/c it would take more energy to pull of a 3p² electron than a 3p¹ electron b/c the orbital would rather look like this: _ _ than this 1 _ _.

Magnesium has higher first ionization energy than strontium.

The valence electrons in Mg are closer to the nucleus and have less shielding, making them more tightly bound than Strontium’s electrons.