Which of the following pairs of elements are likely to form ionic compounds? Check all that apply. Check all that apply. magnesium and chlorine sodium and potassium nitrogen and iodine chlorine and bromine helium and oxygen potassium and sulfur

magnesium and chlorine

Explanation:

An ionic bond is usually formed between a metal and a nonmetal. An ionic bond involves the transfer of one or more electrons from a highly electro positive metal to a nonmeta.

Usually, the electro negativity difference between the two species involved in an ionic bond is usually high.

For instance, the electro negativity of magnesium is 1.31 while that of chlorine is 3.16. This implies that they have a difference in electro negativity of about 1.85 between them which is large enough to be considered as leading to a pure ionic bond. An electro negativity difference above 1.7 is generally regarded as leading to the formation of an ionic bond.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).