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Classifying Matter

TermDefinition
Chemical Formula a combination of symbols that represents the elements in a compound and their proportions; Ex. NaCl = one atom of sodium for every one atom of chlorine
Pure Substance a sample of matter with both definite and constant composition with distinct chemical properties; recipe does not change
Element a pure substance that cannot be broken down into other substances by either physical or chemical means; the basic material that makes up all matte
Compound a pure substance made of two or more different elements chemically combined in a set ratio (the recipe is always the same)
Molecule a neutral particle made of two or more atoms joined in a chemical bond
Mixture two or more substances that are mixed together but are not chemically combined; the recipe is changeable
Solution a well-blended mixture, containing a solvent and at least one solute, which has the same properties throughout
Heterogeneous Mixture a mixture in which pure substances are unevenly distributed throughout the mixture; you can see the different parts (Ex: salad, soil)
Homogeneous mixture a mixture in which substances are evenly distributed throughout the mixture so that you cannot see the various parts (Ex: sweet tea)
Isotope atoms with the same number of protons and electrons, but a different number of neutrons.
Balanced equation the number of the different atoms of elements on the reactants side is equal to that of the products side
Law of Conservation of Matter matter is neither created nor destroyed, so we must have the same number and type of atoms after the chemical change as were present before the chemical change
Created by: missycates
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