The main source of magnesium chloride is

The main source of iodine is

Write the electron dot structure of magnesium and chlorine and show the formation of magnesium chloride by transfer of electrons.

In the formation of magnesium chloride (by direct combination between magnesium and chlorine), name the substance that is oxidised and the substance that is reduced.

Main source of helium is

Write the chemical formulae of Magnesium chloride