Are electrons shared or transferred between Magnesium and Fluorine?

Electrons are transferred between magnesium and fluorine. Magnesium, which has two electrons in its outer shell, tends to lose these electrons to achieve a stable electron configuration. Fluorine, on the other hand, has seven electrons in its outer shell and readily gains an electron to complete its octet. This transfer results in the formation of ionic bonds, with magnesium becoming a positively charged ion and fluorine becoming a negatively charged ion.