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Unit 1.2


Atoms are the smallest unit of an element that maintains the properties of that element.
Pure Substances is a substance that has definite physical and chemical properties such as appearance, melting point, and reactivity.
Heterogeneous mixture is one that does not have a uniform composition.
Homogeneous If you add sugar to a cup of water, the sugar dissolves. Each part of the sugar-water, mixture has the same sweet taste.
Compound a substance made up of atoms of two or more different elements joined by chemical bonds
Element a substance that cannot be separated or broken down into simpler substances by chemical means
Mixture a substance made by mixing other substances together
Solid the state of matter in which the volume and shape of a substance are fixed
Liquid the state of matter that has a volume but not a definite shape
Gas a form of matter that does not have a definite volume or shape
Freezing the change of state from a liquid to a solid.
Melting the change of state from a solid to a liquid.
Evaporation the change of state from a liquid to a gas that usually occurs at the surface of a liquid over a wide range of temperatures.
Boiling the change of state from a liquid to a gas that occurs at a specific temperature.
Condensation the change of state from a gas to a liquid.
Sublimation the change of state from a solid directly to a gas.
Deposition the change of a state from a gas directly to a solid.
Created by: emillieb.vpcs