Matter is made up of ____., atoms, light, water, sound, Atoms are made of _____, ______, and ______., cells, tissues, organs, proton, electron, neutron, light, heat, sound, sand, water, air, What is the charge of a proton?, negative, neutral , positive, changing, What is the charge of a electron?, negative, neutral, positive, changing, What surrounds the positively charged nucleus of an atom?, protons, neutrons, electrons, molecules.

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