Which ones are physical change and which ones are chemical reactions: Evaporation, condensation, melting, combustion, neutralization

How many neutrons does a atom of cobalt have?

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.

What was bohr’s contribution to the planetary model