Combustion reactions are most conveniently studied hints combustion reactions are most conveniently studied there is no way to study a combustion reaction conveniently using a beaker and a thermometer using constant-pressure calorimetry using constant-volume calorimetry

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.

the answer is na (sodium)