Question

AWNSER FAST * people will get reported if they make some nonsense.*

Which has higher ionization energy: chlorine (Cl) or magnesium (Mg)? Why? Select the best answer


1. Mg; magnesium has more valence electrons than chlorine.


2.Mg; it takes more energy to pull two electrons away from magnesium(Mg) than it does to take them from chlorine(Cl).


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

4.Cl; it takes less energy to add an electron to a valence shell that is nearly full.

Answer 1

The element with the higher ionization energy between chlorine (Cl) and magnesium (Mg) is chlorine (Cl).

Ionization energy is the amount of energy required to remove an electron from an atom or ion. In general, elements with smaller atomic radii and higher effective nuclear charges tend to have higher ionization energies.

In this case, chlorine has a smaller atomic radius compared to magnesium. Additionally, chlorine has a higher effective nuclear charge because it has more protons in its nucleus compared to magnesium. These factors make it more difficult to remove an electron from chlorine.

Option 3 is the best answer because it correctly states that it takes much more energy to pull an electron away from a valence shell that is nearly full, which is the case for chlorine.

On the other hand, magnesium has more valence electrons compared to chlorine, but it has a larger atomic radius and a lower effective nuclear charge, making it easier to remove electrons from magnesium. Therefore, option 2 is incorrect.

Remember, ionization energy is influenced by factors such as atomic radius and effective nuclear charge, which determine how tightly the electrons are held by the nucleus.

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Answer 2

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

Ionization energy is the energy required to remove an electron from an atom or ion. In general, ionization energy increases as you move across a period from left to right on the periodic table.

Chlorine (Cl) is located in Group 17, also known as the halogens. It has seven valence electrons in its outermost energy level. Chlorine is only one electron away from having a full valence shell, which is more stable. It takes a significant amount of energy to remove an electron from a valence shell that is nearly full because of the increased electrostatic attraction between the negatively charged electron and the positively charged nucleus.

On the other hand, magnesium (Mg) is located in Group 2, also known as the alkaline earth metals. It has two valence electrons in its outermost energy level. Magnesium is two electrons away from having a full valence shell. While it still requires energy to remove electrons from magnesium, it is easier compared to chlorine because the valence shell is not as close to being full.

To summarize, chlorine has a higher ionization energy compared to magnesium because it takes much more energy to pull an electron away from a valence shell that is nearly full

Step-by-step explanation:

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