Freezing Point - The temperature at which a liquid changes to a solid. (Physical Change), Volume - The amount of space an object takes up, Matter - Anything that has mass and takes up space., Evaporation - change in state from a liquid to a gas , Condensation - change in state from a gas to a liquid, Proton - Subatomic particle with a positive charge and located in the nucleus of an atom, Electron - Subatomic particle with a negative charge, Element - A substance that cannot be broken down by any means., Atomic Number - The number of protons in the nucleus of an atom., Atomic Mass - the average mass of all isotopes of an atom. It is equal to the number of protons plus neutrons in the nucleus of an atom,

matter

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