the smallest unit of an element that has the properties of that element
atom
material that has mass and takes up some amount of space
matter
a pure substance that cannot be broken down into simpler substances by chemical reactions
element
a chemical combination of two or more elements
compound
a combination of substances that can be physically separated from one another
mixture
made up of two or more distinct components; usually refers to a mixture in which individual substances are distinct
heterogeneous mixture
made up of one uniform component; often used to describe a mixture with a consistent composition and a single phase throughout
homogeneous mixture
matter with a fixed volume and shape
solid
a state of matter with a defined volume but no defined shape
liquid
a state of matter without any defined volume or shape in which atoms or molecules move about freely
gas
an object's mass divided by its volume; a measure of how many particles are packed together into a certain amount of space
density
the amount of matter in an object
mass
the amount of space an object or substance takes up
volume
a subatomic particle with a positive charge that is located in the nucleus of an atom
proton
a subatomic particle with no electric charge, located within the nucleus of the atom
neutron
a subatomic particle with a negative charge
electron
a heterogeneous mixture in which moderate sized particles are suspended in a liquid or gas where they are supported by buoyancy
suspension
the ability of a substance to be dissolved in a liquid
solubility
a material with a particular chemical makeup
pure substance
electrically-charged particle (positive or negative)
ion