Which statement best explains why magnesium and chlorine combine in a 1:2 ratio?(1 point)

Chlorine can accept twice as many electrons as magnesium has in its outer shell.

Chlorine’s atomic number is twice magnesium’s atomic number.

Magnesium has one electron shell, and chlorine has two electron shells.

Magnesium has two valence electrons, and chlorine can accept one electron in its outer shell.

The reason why magnesium and chlorine combine in a 1:2 ratio is that magnesium has two valence electrons, and chlorine can accept one electron in its outer shell.

Magnesium is a metal in group 2. It has two valence electrons in its outermost shell which it can easily give out during chemical combination. Chlorine is a nonmetal in group 17. It has seven valence electrons hence it accepts one valence electron.

Hence, magnesium and chlorine combine in a 1:2 ratio because magnesium has two valence electrons, and chlorine can accept one electron in its outer shell.

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