| A | B |
|---|
| Mole | the amount of a substance that contains 6.02 x 10^23 representative particles of that substance |
| Avogadro’s number | the number of protons in the nucleus of an atom of an element |
| Gram atomic mass | the quantity of an element whose weight in grams is numerically equal to the atomic weight of the element. |
| Gram molecular mass | the mass, in grams, of one mole of a molecular substance |
| Gram formula mass | the mass of one mole of an ionic compound |
| Molar mass | a general expression used to refer to the mass of a mole of any substance unless a more specific term is needed to avoid confusion |
| Standard temperature and pressure (STP) | the conditions under which the volume of a gas is usually measured: standard temperature is 0 degrees Celcius and standard pressure is 1 atm |
| Molar volume | the formula occupied by 1 mole of a gas at standard temperature and pressure (STP) |
| Percent composition | the percent by mass of each element in a compound |
