In ionic bonding an arrow is often drawn on the diagram. What does
the arrow show?
A) How the ion forms
B) The direction of the reaction
C) The direction the electrons move to form the ions
D) How the protons move

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