Atoms are the smallest form of Elements

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					Atoms are the smallest form
       of Elements
    Unit D Section 1.1 Foldable
• All matter is
  made up of atoms
• Most common
  elements
• Names and
  symbols of
  elements
All Matter is Made Up of Atoms
• Greeks used to think there were 4
  elements – earth, air, fire, water
• Now scientists have found about 100
  elements that make up everything
       Most Common Elements
• Hydrogen – most common element in the universe

• Oxygen – most common element in Earth’s crust
           and humans

• All living things are made mostly of Oxygen,
  Carbon, Hydrogen, & Nitrogen
          Names and Symbols
             of Elements
• Elements get their names from
    • people, places, & Greek words
• Element symbols
    •   Maybe 1 or 2 letters
    •   1st letter is always capital
    •   2nd letter is always lower
    •   Symbols may come from Latin names
1. The most common element
       in the universe is
        •   a. nitrogen
        •   b. hydrogen
        •   c. oxygen
        •   d. aluminum

				
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posted:7/10/2012
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