| A | B |
|---|
| Law of Conservation of Mass | Can't create or destroy mass through physical or chemical means |
| Balanced Equation | Atoms of each element are = on both sides of an equation |
| Subscript | Indicates number of atoms of an element |
| Coefficient | Indicates the number of molecules |
| Synthesis | 2 or more substances combine to form a new substance |
| Decomposition | A compound breaks down |
| Single replacement | A more reactive element replaces a less reactive element in a compound |
| Double replacement | Compounds rearrange and form new compounds |
| Atom | Smallest part of an element that retains the characteristics of that element |
| Molecule | 2 or more atoms chemically combined |
| Compound | 2 or more elements chemically combined |
| Valence Electrons | Electrons on the outer energy level that determine the reactivity of an element |
| Metals | Shiny, malleable, ductile, conductors |
| Non-metals | Dull, mostly gas, opposite of metals |
| Metalloids | Semi-conductors, properties of metals & non-metals |
| Element | Pure substance made of only 1 type of atom |
