Which pair of elements is likely to form an ionic compound, and why? a Li and Cl, because one is a metal and the other is a nonmetal b Cl and Br, because both are members of the same family c C and I, because both are nonmetals d K and He, because one is a metal and the other is a noble gas

a) Li and Cl, because one is a metal and the other is a nonmetal

Explanation:

An ionic compound is usually formed between a metal and a non metal. Recall that an ionic bonds involve the transfer of electrons from the metal to the non-metal.

in an ionic bond,  there must  be a significant difference between the electro negativities of the bonding atoms for electron transfer to occur. This is why the ionic bond only occurs between a metal and a non-metal.

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

i believe it is c.) 1575 j.