Aka “pure susbtances”

MATTER

• Has mass and takes up space (volume).

• Made of atoms (proposed in ancient Greece, verified in the last 200 years).

• All solids, liquids, and gases are matter.

MIXTURE

• A combination of 2 or more substances that can be separated by physical means (sorting, filtering, heating, cooling)– Chicken Soup– Rocky road Ice Cream– Soil– Sugar water

PURE SUBSTANCE

• Cannot be separated by physical means (sorting, filtering, heating, cooling)

• All particles making it up are the same (either atoms or molecules)

• ALWAYS HOMOGENOUS!– Gold– Table Salt

HOMOGENEOUS MIXTURE

• A mixture that has the same composition throughout. Also called a solution.– UNOPENED can of soda– Alloys– Kool-Aid– Salt water

HETEROGENEOUS MIXTURE

• A mixture in which the composition is not the same throughout.– Chicken Noodle Soup– Italian Salad Dressing

ELEMENT

• A substance made up of only one type of atom. Atoms are the smallest part of an element

• Each has a unique symbol.– Silver (Ag)– Gold (Au)– Hydrogen (H)– Oxygen (O)

COMPOUND• A pure substance that is made of 2 or more

elements chemically combined.• Can only be separated by chemical means

(burning, chemical reactions).• Smallest part called a molecule.• Each has a unique formula.

– Table Salt (NaCl)

– Rock Salt (CaCl2)

– Water (H2O)