Question

show the formation of the following compounds by the transfer of electrons bt the combining atoms. Write symbols of their cations and anions. 1) zinc chloride 2)calcium oxide 3)aluminium oxide 4)calcium fluoride

Answer 1

1)zncl2
valency:1)zinc:+2,chlorine:-1. in the outer shell.
therefore zinc looses two elctron to become stable and 2 of each chlorine atom gain or accept single electron to achieve stable electronic configuration.
2)cao
valancy:calcium(ca):+2,oxygen:-2
therefore ca atom losses 2e and those two electron are accepted by oxygen atom and hence the compound is formed
3)AL2O3
valancy:al:3,O:-2
4)caf2
valency:ca:2,f:-1.