Substance
A single kind of matter that is pure and has a specific set of properties.
Matter
Anything that has mass and takes up space
Physical Property
A characteristic of a pure substance that can be observed without changing it into another substance
Chemical Property
A characteristic of a pure substance that describes its ability to change into different substances
Element
A substance that cannot be broken down into simpler substances
Atom
the basic unit of a chemical element.
Chemical bond
the force that holds two atoms together
Molecule
two or more atoms held together by chemical bonds