Which of these period three elements from the periodic table would you predict to be the most metallic?
a)al
b)ar
c)cl
d)si

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.