Rain, snow, sleet, and fog are forms of precipitation. This is an example of a
A) scientific law.
B) scientific theory.
C) theoretical observation.
D) hypothetical observation.

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent