| A | B |
|---|
| formula weight | The sum of the masses of the atoms in a chemical formula (in amu). |
| molecular weight | The sum of the masses of the atoms in a chemical formula of a molecule (in amu). |
| molecule | Two or more atoms chemically combined. |
| formula unit | The smallest repeating unit of an ionic compound. |
| percent composition | The percent of the mass of a compound contributed by each atom. |
| mole | 6.02x10^23 particles of any substance |
| Avagadro's number (definition) | The number of carbon-12 atoms in 12g of carbon. |
| molar mass | The mass of one mole of a substance (in grams). |
| Avagadro's number (numerically) | 6.02x10^23 |
