Answer :
New combination Predicted formula
K + Cl KCl
Al + F
Sn +
Ca + Br

Si + Br

Ce + I CeI
Explanation :
New combination and predicted formula of given compounds are shown below in image.
Ionic compounds are the ones which are formed when metal and non-metal combines in their ionic form.
For the formation of compound, all charges on the metal and non-metal should be balanced.
Like, we take an example of compound
, in this the +2 charge of Ca is balanced by the 2
ions.