Which has a higher ionization energy: chlorine (Cl) or magnesium (Mg)? Why? Select the best answer.(1 point) Responses Cl; it takes much more energy to pull an electron away from a valence shell that is nearly full. Cl; it takes much more energy to pull an electron away from a valence shell that is nearly full. Mg; magnesium has more valence electrons than chlorine. Mg; magnesium has more valence electrons than chlorine. Cl; it takes less energy to add an electron to a valence shell that is nearly full. Cl; it takes less energy to add an electron to a valence shell that is nearly full. Mg; it takes more energy to pull two electrons away from magnesium(Mg) than it does to take them from chlorine(Cl).

Question

what is the correct answer? answer 100% correctly?

Answer 1

The correct answer is: Cl; it takes much more energy to pull an electron away from a valence shell that is nearly full.

Chlorine has a higher ionization energy than magnesium because it is closer to achieving a full outer electron shell, which reflects a strong attraction between the nucleus and the electrons. As a result, removing an electron from chlorine requires significantly more energy compared to magnesium, which has a lower ionization energy due to having fewer valence electrons and being further from a full outer shell.