chemistry 5
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19 terms
Terms | Definitions |
|---|---|
 avogadro's number | number of particles in one mole of a substance; 6.02 x 10^23 |
| chemical equation | the statement showing how substances react using chemical formula |
| compound | two or more substances bonded together through a chemical equation. |
| amphoteric | a substance that can react like an acid and a base |
| atom | the fundamental building blocks of matter |
| atomic mass | the exact mass of an atom |
| atomic number | the number of protons in an element; defines the element |
| barometric pressure | the pressure of the atmosphere at a specific location |
| base | a substance that forms OH- in water or a proton acceptor |
| chemical equation | the statement showing how substances react using chemical formulas |
| chemical formula | the symbols and subscripts showing the composition of a compound |
| chemical properties | characteristics describing how a substance reacts with other substances |
| covalent bond | a chemical bond where atoms share electrons |
| density | the mass divided by the volume |
| enthalpy | the heat energy gained or lost during a chemical reaction |
| entropy | a measure of the randomness of a reaction |
| polyatomic ion | an ion composed of more than one element |
| salt | an ionic compound formed by the reaction of an acid and a base |
| semimetals | elements that have characteristics of both metals and non-metals |
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