Write down the electron arrangement in (i) a magnesium atom, and (ii) a chlorine atom.

44 Why are ionic compounds usually hard? 44 How is it that ionic compounds in the solid state do not conduct electricity but they do so when in molten state?’ 45 How many electrons are there in the valence shell of (i) a magnesium atom, and (ii) a chlorine atom ? 45 Show the formation of magnesium chloride from magnesium and chlorine by the transfer of electrons.