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| A substance that cannot be broken down into other substances through chemical or physical means |
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| the smallest particle of an element |
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| tiny central core of the atom where the protons and neutrons are located |
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| subatomic particle with a positive charge found in the nucleus |
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| Subatomic particle with no charge/neutral found in the nucleus |
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| subatomic particle with a negative charge found outside the nucleus |
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| the number of protons in an atom's nucleus |
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| unit used to measure the mass of an atom |
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| electrons held in the furthest shell away from the nucleus |
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| a force that holds atoms together, valence electrons may be transferred or sharred between atoms |
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| diagram made up of a symbol surrounded by dot representing the valence electrons |
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| property that can observed without changing the substance into something else |
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| property that can only be observed when a substance interacts with another substance, changes into comething else |
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| organization of the elements based on chemical and physical properties and atomic structure |
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| the elements of a single column of the periodic table |
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| horozontal row of the periodic table |
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| elements found on the left side of the periodic table that are often shiney, malleable and good conductors of heat and electricity |
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| elements on the periodic table that are found on the far right that are often crumbly, dull and do not conduct heat or electricity |
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| Elements found along the zig/zag between metals and nonmetals that share properties of both metals and nonmetals |
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| Elements such as Lithium and Sodium who are found in group 1 of the periodic table, they are very reactive and have two valence electrons |
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| Elements such as Berillium and Calcium that are found in group 2 of the periodic table, they are less reactive than alkali metals and have two valence electrons |
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| Group of elements such as Copper, Zinc and Gold found in the center of the periodic table from group 3 to group 12 |
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| Group of elements such as Aluminum found in group 13 of the periodic table, contains both metals and metalloids, and have 3 valence electrons |
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| Group of elements such as Silicon and Tin found in group 14 of the periodic table, contains metals, metalloids and non metals and has 4 valence electrons |
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| Elements such as Phosphorous found in group 15 of the periodic table, contains metals, metalloids and nonmetals and has 5 valence electrons |
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| Group of elements such as sulfur found in group 16 of the periodic table, contains metals, metalloids and non metals and has 6 valence electrons |
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| Elements such as Flourine and Chlorine found in group 17, contains metalloids and non metals and has 7 valence electrons |
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| Group of elements such as Helium and Neon found in group 18 of the periodic table, contains only non metals and have 8 valence electrons |
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| Particle made of two or more atoms bonded together, can be two of the same element |
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| substance made of two or more elements that have been chemically bonded |
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| shorter, easier way to show chemical reactions |
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| combination of symbols that represent elements in a compound |
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| Numbers in a formula written smaller and lower than the letter symbols, show the ratio of atoms of different elements in a compound |
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| Substances found at the begining of a chemical reaction |
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| Substances found at the end of a chemical reaction |
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| number placed in front of a chemical formula in an equation |
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