An atom that no longer has a neutral charge is called a(n) . compound molecule isotope ion

distance, luminosity, brightness, radius, chemical composition, and temperature

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.