Which particles make up the nucleus of an atom?
protons and electrons
electrons and neutrons
o neutrons and protons
protons, neutrons, and electrons

It is 4.92 e-4 sorry if i am wrong

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.