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