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Classifying Matter

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
Created by: missycates