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Matter Vocabulary matter __________________ anything that has mass takes up space __________________ property describes an object (color, size, texture) atom __________________ small particle that is the basic unit of matter molecule __________________ two or more atoms chemically bonded together density __________________ a physical property that describes the mass per unit volume of a substance solid liquid gas proton __________________ the positively charged particle in the nucleus of an atom neutron __________________ a particle with no charge in the nucleus of an atom electron __________________ negatively charged particles in an atom (in a cloud around the nucleus) element __________________ matter made of only one type of atom Examples: oxygen, calcium Periodic Table __________________ a chart that organizes all known elements __________________ compound matter made by combining two or more different kinds of elements Examples: water chemical formula __________________ a formula composed of symbols and numbers that shows which elements make the compound Example: H2O mixture __________________ two or more substances put together that do not form a compound Example: rocks, air mass __________________ a measure of the amount of matter in an object chemical equation __________________ symbols that show how matter changes during a chemical reaction reactants __________________ Substance that is changed during a chemical reaction products __________________ new substance created during a chemical reaction
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