Make a rule if you knew the number of valence electrons in a nonmetal atom, how would you determine the valence of the elment? (hint: ignore hydrogen now.)

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.