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color, odor, melting point, conductivity, solublity, hardness, boiling point, density, malleability => DON'T CHANGE the sample
have definite volume but not shape, less ordered, more energy, if something is aqueous (aq) it is dissolved in water
Nucleus of an atom
made of protons (+) and neutrons (ø), most of atom's mass is here, # of protons determines what each element is
less common forms of an element, have SAME # of protons but DIFFERENT # of neutrons, have a different mass
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