Unit 1 - Matter

Matter

Anything that has mass or takes up space

Particle

1 piece of matter (atom or molecule)

Atom

The smallest unit of matter that defines a chemical element

Molecule

2 or more chemically bonded atoms

Compound

2 different kinds of atoms present in a molecule

Element

A substance made of only one type of atom

Mixture

2 or more types of particles (matter)

Pure substance

Only 1 same type of particle present

Homogeneous mixture

Uniform composition or solution

Heterogeneous mixture

Different or variable composition

Solution

A homogenous mixture of solutes dissolved in solvent

Physical property

Observable characteristic (ex. color, state of matter, density)

Chemical property

Ability to react

Physical change

A change that doesn’t affect the identity

Chemical change

A chemical reaction where a substance(s) is formed or broken. Bonds are broken and/or formed

Intermolecular forces

Attraction between particles

Solid to liquid

Melting

Liquid to Gas

Vaporization

Gas to solid

Deposition

Solid to gas

Sublimation

Gas to liquid

Condensation

Liquid to solid

Freezing