Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
22 Cards in this Set
- Front
- Back
Atom |
The smallest particle that can exist |
|
Relative atomic mass |
The weighted mean mass of an atom of an element compared with one twelfth of the mass of an atom of carbon-12 |
|
Isotope |
Atoms of the same element with different numbers of neutrons and different masses |
|
Relative isotopic mass |
The mass of an isotope compared with one twelfth of the mass of an atom of carbon 12 |
|
Relative molecular/formula mass |
The weighted mean mass of a molecule of a compound compared with one twelfth of the mass of an atom of carbon 12 |
|
Amount of a substance(mol) |
The quantity whose unit of the mole. Chemists use amount of substance as a means of counting atoms |
|
Avagadro constant |
6.02×10^23mol-1 the number of atoms per moleof carbon 12 |
|
Molar mass (g mol-1) |
The mass per mole of a substance in units of g mol-1 |
|
Molar gas volume (dm3 mol-1) |
The volume per mole of gas molecules at a stated temperature and pressure |
|
Empirical formula |
A formula that shows the simplest whole number ratio of atoms of each element present in a compound |
|
Molecular formula |
A formula the shows the number and type of atoms of each element present in a molecule |
|
Stoichiometric formula |
The ratio of the amount in moles of each substance in a chemical reaction |
|
Spectator ion |
The ions that do not change in the reaction |
|
Ionic equation |
An equation where the electrolytes in aqueous solution are written as dissociated ions |
|
Titration |
A technique used to accurately measure the volume of one solution that reacts exactly with another solution |
|
Equation of gas moles |
pV=nrt |
|
Anhydrous |
Containing no water molecules |
|
Hydrated |
Containing water molecules |
|
Water of crystallisation |
Water molecules that are bonded into a crystalline structure of a compound |
|
Ideal gas law |
The volume occupied by moles of any gas has a pressure at temperature in kelvin. pV=nRT, where R- gas constant, called the ideal gas law /equation of state |
|
Percentage yield |
Actual yield÷theoretical yield ×100% |
|
Atom economy |
A measure of how well atoms have been utilised |