SOL 6.4 study stack
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| atom | the smallest unit of an element that retains (or keeps) the properties of that element
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| element | substance composed of a single kind of atom that cannot be broken down into other substances by chemical or physical means
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| molecule | two or more atoms that are bonded together
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| Proton | small positively charged particle located inside the nucleus
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| Neutron | small uncharged particle located in the nucleus
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| Electron | tiny negatively charged particle with high power and moves fast around the nucleus
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| Periodic table | Organized table of all the known elements
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| Matter | anything that has mass and takes up space
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| atomic number | the number of neutrons and protons in an atom
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| atomic symbol | an abbreviation for the element name
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| atomic mass | the mass of protons and neutrons
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| compound | a molecule with two or more elements chemically bonded
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| mixture | two or more elements are mixed but not chemically combined
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| nucleus | central core of an atom that contains the protons and neutrons
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| electron shells | fixed orbits or paths that electrons follow around the nucleus
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| chemical bond | the force that holds two or more atoms together
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