What is the total number of protons, neutrons, and electrons, in a barium (Ba) atom that has a mass number of 137?

1.solid

2.carbon dioxide

3.helium

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.

so what is the problem with your lab report and whats the subject of the lab report? i will you

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.