What property of an element does the atomic number represent?
a. the mass of the atom
b. the size of the atom
c. the number of protons in the atom
d. the number of neutrons in an atom

the solar system used to have much dust particles option no d

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.