The state of matter in which the molecules are closest together is the
liquid phase
gas phase
solid phase

The necleus of an atom is made up of what subatomic particles?

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •  

How many atoms of nitrogen are in the chemical formula ni(w on