MATTER CAN BE CLASSIFIED INTO THREE GROUPS

• ELEMENTS

• COMPOUNDS

• MIXTURES​

Elements

Simplest form of matter

• Substance that cannot be broken down 

• All matter is composed of elements

• Each element is made up of tiny particles called atoms

• Arranged on The Periodic Table of Elements

• An element's symbol will have ONE CAPITAL LETTER only and lower case letters and numbers if needed​

• Examples of Elements: Neon (Ne), Helium (He), Hydrogen (H), Oxygen (O₂)

• Diagrams --> will have the only one kind of symbol throughout​

Compounds

Two or more elements CHEMICALLY COMBINED

• Elements are found in specific ratios

  • Example: H₂O is Water, but if you add another Hydrogen which would be H₂O₂ you get Hydrogen Peroxide!

• Substances in a compound have completely NEW AND DIFFERENT properties than they have before they were chemically combined

• Compounds CAN BE BROKEN DOWN using CHEMICAL MEANS

  • example: decomposition, electrolysis,​ chemical reactions

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Compounds

Two or more elements CHEMICALLY COMBINED

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• Symbols for compounds will have TWO or More CAPITAL LETTERS with lower case letters and numbers if needed

• Diagram -> two or more different dots will be touching and the pattern will be the same throughout

Examples of compouds: Salt(NaCl), Sugar (C₁₂H₂₂O₁₂)

Mixtures

• Two or more elements, compounds, or both that are PHYSICALLY combined

• Substances are NOT found in specific ratios​

• Substances in a mixture keep their original properties

• Examples: Air, Fruit Salad, Chex Mix

• Diagrams --> Different symbols mixed together​