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| the total number of protons and neutrons in the nucleus of an atom |
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| the number of protons in the nucleus of an atom; used to catogorize elements on the periodic table |
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| the study of the elements |
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| protons and neutrons formed together at the center of a cell by strong force |
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| negatively charged particles |
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| positively charged particles |
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| pure substance that consists entirely of one type of atom |
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| one of several forms of a single element, which contains the same number of protons but different numbers of neutrons |
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| substance formed by the chemical combination of two or more elements in definite proportions |
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| chemical bond formed when one or more electrons are transferred from one atom to another |
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| atom that has a positive or negative charge |
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| a process that changes, or transforms, one set of chemicals into another |
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| the elements or compounds produced by a chemical reaction |
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| the elements or compouds that enter a chemical reaction |
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| Law of Conservation of Mass |
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| a relation stating that in a chemical reaction, the mass of the products equals the mass of the reactants |
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| a representation of a substance using symbols for its constituent elements |
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| a chemical formula showing the composition and structure of a molecule |
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| occurs when the electrons of one atom are shared or taken by another atom |
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| type of bond between atoms in which the electrons are shared |
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| smallest unit of most compounds that displays all the properties of that compound |
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| a molecule containing two atoms |
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| slight attraction that develops between oppositely charged regions of nearby molecules |
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| weak attraction between a hydrogen atom and another atom |
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| attraction between molecules of the same substance |
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| force of attraction between different kinds of molecules |
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| material composed of two or more elements or compounds that are physically mixed together but not chemically combined |
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| type of mixture in which all the components are evenly distributed |
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| substance that is dissolved in a solution |
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| dissolving substance in a solution |
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| mixture of water and nondissolved material |
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| scale with values from 0 to 14, used to measure the concentration of H+ ions in a solution; a pH of 0 to 7 is acidic, a pH of 7 is neutral, and a pH of 7 to 14 is basic |
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| compound that forms hydrogen ions (H+) in a solution; a solution iwth a pH of less than 7 |
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| compound that produces hydroxide ions (OH-) in a solution; solution with a pH of more than 7 |
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| compound that prevents sharp, sudden changes in pH |
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| a weak acid or weak base that exhibits a color change as the concentration of hydrogen (H+) or hydroxide (OH-) ions changes in a solution. |
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| Reaction between an acid and a base which produces a neutral solution (pH = 7) |
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| ionic compounds that result from the neutralization reaction of an acid and a base |
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