Which statement best explains why magnesium and chlorine combine in a 1:2 ratio?(1 point)
Responses
Chlorine’s atomic number is twice magnesium’s atomic number.
Magnesium has one electron shell, and chlorine has two electron shells.
Chlorine can accept twice as many electrons as magnesium has in its outer shell.
Magnesium has two valence electrons, and chlorine can accept one electron in its outer shell.