Sodium chloride (naci) is made from of sodium (na) and of chlorine ( ci)
one atom or two atom? ( one or two for each)

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.