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6th Physical Science

The smallesst unit of an element that maintains the properties of that element. atoms
The 3 major classes of matter... elements, compounds, and mixtures
A substance made up of one type of atom. element
A particle made up of two or more atoms that are joined together chemically. molecule
Two or more elements made up of different kinds of atoms chemically combine. compound
A substance that contains a variety of elements and compounds that are not chemically combined with each other. mixture
A substance that has definite physical and chemical properties such as appearance, melting point, and reactivity. pure substance
A mixture that does not have a uniform composition. heterogeneous mixture
A mixture where substances are evenly spread throughout. homogeneous mixture
A type of heterogeneous mixture in which the particles are spread throughout but are too large to stayed mixed without being stirred/shaken. suspensions
Homogeneous mixture where one substance is dissolved in another substance. solutions
A type of mixture where SMALL particles spread throughout a liquid or gas, but do not settle out quickly. colloids