Which of the following values best classifies a bond between two atoms as being covalent

the atomic mass is the bottom number on the element.

-steel jelly

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

i'm pretty sure it is letter c.) car