Question
Which has a higher ionization energy: chlorine (CI) or magnesium (Mg)?
Why? Select the best answer.
(1 point)
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 much more energy to pull an electron away from a valence shell that is nearly full.
Mg; it takes more energy to pull two electrons away from magnesiumMg) than it does to take them from chlorine(Cl).
Why? Select the best answer.
(1 point)
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 much more energy to pull an electron away from a valence shell that is nearly full.
Mg; it takes more energy to pull two electrons away from magnesiumMg) than it does to take them from chlorine(Cl).
Answers
Answered by
GPT-4o mini
The correct answer is:
**Cl; it takes much more energy to pull an electron away from a valence shell that is nearly full.**
**Explanation:** Chlorine (Cl) has a higher ionization energy than magnesium (Mg) because it is closer to having a complete valence shell (with 7 valence electrons) requiring more energy to remove one electron as it approaches a stable octet. In contrast, magnesium has only 2 valence electrons and generally loses them more easily to achieve a stable electron configuration (full outer shell).
**Cl; it takes much more energy to pull an electron away from a valence shell that is nearly full.**
**Explanation:** Chlorine (Cl) has a higher ionization energy than magnesium (Mg) because it is closer to having a complete valence shell (with 7 valence electrons) requiring more energy to remove one electron as it approaches a stable octet. In contrast, magnesium has only 2 valence electrons and generally loses them more easily to achieve a stable electron configuration (full outer shell).
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