2. Show the electronic transfer in the formation of following :i)Sodium oxideii) Calcium Hydrideii) (Magnesium chloride ( At.Nos. Na=11 , O=8 , Ca=20 , H=1 , Mg=12 , Cl=17 )

Na2O- Na has a valency of +1 and Cl has a valency of -2 thus 2atoms of Na proved 2 elecrotns to 1 atome of Cl.Similarly for CaH2 -valency of Ca is +2 and valency of H is -1 ,thus 1 atom of Ca provide 2 electrons to 2 atoms of H