An atom contains one proton, one electron, and one neutron. which two particles are most similar in mass? the neutron and the electron the proton and the electron the proton and the neutron the neutron and the atom

Evaluate this exponential expression,8. (2 + 3)2 – 42

How many moles are in 250 grams of tungsten (w)? * 4.4x10^23 moles 4.2x10^23 moles 0.7 moles 1.4 moles

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.