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.