NaCI an electrovalent compounds is formed as a result of transfer of……….. (one, two, three) valence electrons from metallic sodium to non-metallic chlorine atom. CaO is similarly formed as a result of transfer of…………… (one, two, three) valence electron/s from metallic calcium to non-metallic oxygen and magnesium chloride by transfer of……….. (one, two, three) valence electron/s from ………..(one, two) magnesium atom/s to……….. (one, two) chlorine atom/s.
