A reaction is performed in a beaker with a temperature probe recording the temperature changes of the reaction. If the temperature began at 15.0 degrees
Celsius and ended at 27.5 degrees Celsius. If the reaction is our system, is the
system endothermic or exothermic?

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.

2b2t

explanation:

2b2t

the answer is c

tell me if wrong