- Atoms: are the smallest particles of an element.
- Chemical bond: is the force that holds two atoms together.
- Density: relates the mass and volume of an object or material. To calculate density of a sample, divide its mass by its volume.
- Electrodes: are a metal strip that conducts electricity; often used in the electrolysis process.
- Electrolysis: is a process by which an electric current breaks chemical bonds.
- Internal Systems of Units: are the units that scientists use to measure matter.
- John Dalton: thought that atoms were like tiny marbles, or rigid spheres that are impossible to break.
- Mass: of an object is the measurement of how much matter it contains.
- Molecule: is a group of atoms that are joined together and act as a single unit.
- Ore: is any rock that contains a metal or other economically useful material.
- Volume: is the amount of space that matter occupies.
- Weight: is a measure of the force of gravity on you.