Part a: what is the reason that atoms form bonds with other atoms?

Part b: use the image to explain why one magnesium atom forms a bond with two chlorine atoms.

Atoms typically prefer having filled valence orbitals. In a chlorine atom one electron is necessary to have a filled valence orbital. This explains why the electron affinity for Chlorine is so exothermic, since chlorine wants a filled valence orbital. Magnesium on the other hand wants to lose 2 electrons in order to resort to its 2nd energy level with a filled orbital. This explains why magnesium has a desire to lose its electrons. Therefore, both magnesium and chlorine have filled valence shells when participating in a bond

note: I went a little overboard with this explanation... feel free to make any revisions.

Hope this helped, 2Trash4U

Part a: what is the reason that atoms form bonds with other atoms? Part b: use the image to explain why one magnesium atom forms a bond with two chlorine atoms.

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Part a: what is the reason that atoms form bonds with other atoms?

Part b: use the image to explain why one magnesium atom forms a bond with two chlorine atoms.