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Which has a higher ionization energy: chlorine (Cl) or magnesium (Mg)? Why? Select the best answer
Cl; it takes less energy to add an electron to a valence shell that is nearly full.


Mg; magnesium has more valence electrons than chlorine.


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


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

Respuesta :

Ionization energy is required to remove the electron bounded loosely. Chlorine has higher ionization energy as it requires less energy to add an electron to the valence shell. Thus, option A is correct.

What is ionization energy?

Ionization energy has been defined as the element's capability to acquire or donate electrons in a chemical reaction to break to form bonds.

Chlorine has higher ionization energy than magnesium as to need less amount of energy to add an electron to a nearly full valence shell. It is possible due to its small size and greater nuclear charge.

Therefore, option A. Chlorine needs less energy to add electrons and has higher ionization energy.

Learn more about ionization energy here:

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