When scientists look at these examples, what do they know about the atoms? . carbon–12 carbon–14. a. the number of neutrons in each atom is not the same.. b. the atoms have different properties.. c. one atom has more protons than the other.. d. only one of the examples is an isotope.

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.