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science chp-3 sec-3
Term | Definition |
---|---|
substances | matter that has the same composition and properties ex. elements and compounds |
compound | substance formed when elements combine has properties different from the elements that make it up NaCl-SALT |
mixture | combination of substances that have NOT formed a new substance and whose proportions or ratios can be changed without changing its identity ex. -sand and water air blood lava cinnamon sugar |
homogeneous mixture | the same throughout you can't see the different parts in the mixture milk and food coloring |
heterogeneous mixture | NOT the same throughout you can see the different parts a chocolate chip cookie |
formula | tells which elements make up a compound and how many uses a subscript to tell the number of atoms H20- WATER H2O2- HYDROGEN PEROXIDE |