CLASSIFYING MATTERPure Substances and Mixtures

Matter can be classified as either a Pure Substance or a Mixture

Pure Substances contain only ONE TYPE of matter and CANNOT be broken down into smaller parts

Pure Substances can be further categorized as ELEMENTS OR COMPOUNDS

ELEMENTS contain only one type of ATOM and cannot be broken down into anything simpler.

ELEMENTS contain only ONE type of atom and cannot be broken down into anything simpler.

Example: Gold, copper, silver, sulfur, oxygen, helium, etc.

Compounds two or more elements chemical bound together. (Therefore consist of MORE THAN ONE type of atom).

Compounds consist of MORE THAN ONE type of atom.

Examples: water (H2O), Salt (NaCl), Carbon dioxide (CO2),

Matter can also exist in MIXTURES

Mixtures

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Mixtures contain two or more pure substances NOT chemically bound together

Homogeneous Mixtures

Homogeneous Mixtures:LOOK the same throughout

Example: Koolaide, salt water, atmosphere

Heterogeneous Mixtures

Heterogeneous Mixtures:You can SEE individual parts

Example: Salad, granola, chicken noodle soup, bubble tea

Activity

• Sort the samples as either Pure Substances or Mixtures.

• Then further specify whether the Mixture is homogeneous or heterogeneous.