526 133 3821 P: 12345 j _o _I _n g _I _r l o. n z-oo-o-m​

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.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

answermeridional ;