A sample in lab displaces 15mL of water in a graduated cylinder l. When placed on a scale the mass is 8.7g. What is the density of the sample?

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.