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Even though so much energy is required to form a metal cation with a 2+charge, the alkaline earth metals form halides with general formula MX₂, rather than MX.
(d) Is MgCl favored energetically relative to MgCl₂? Explain.

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What is Alkaline Earth Metal?

  The alkaline earth metals are the elements that correspond to group 2 of the modern periodic table.

   All elements of this group forms a cation of +2 charge.

 This group involves:

Beryllium (Be), Magnesium(Mg), Calcium (Ca), Strontium (Sr), Barium(Ba) and Radium (Ra).

What is Halogens?

The Halogen elements are present in group 17 of the modern periodic table.

  All elements of this groups forms anion of -1 charge .

This group involves:

Fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At)

Since , magnesium has +2 cation charge so it reacts with 2 chlorine atoms rather than 1 in order to complete their octate and becomes more stable as chlorine has cahrge of -1.

 If one chlorine atom react with magnesium then it does not complete the octet of magnesium and compound becomes unstable.

Hence,

MgCl favored energetically relative to MgCl₂

Learn more about Ionic bond here:https://brainly.com/question/13526463

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