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Atoms, Elements, and Formulas. Atoms and Elements Chemical Formulas. I. Atoms and Elements. Atoms are the smallest unit of matter that can be achieved through normal means Atoms can be broken into smaller pieces using giant particle accelerators, but the pieces are different than the atom

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atoms elements and formulas

Atoms, Elements, and Formulas

Atoms and Elements

Chemical Formulas

i atoms and elements
I. Atoms and Elements
  • Atoms are the smallest unit of matter that can be achieved through normal means
    • Atoms can be broken into smaller pieces using giant particle accelerators, but the pieces are different than the atom
  • Elements are the different types of atoms
    • There are about 116 known elements
    • How many atoms and elements are in H2O?
      • 3 atoms, 2 elements
ii chemical formulas
II. Chemical Formulas

Aluminum Sulfate has the following formula

Parenthesis group atoms into chunks

Numbers out in front tell you how many of the entire compound you have

Numbers outside of parenthesis tell you how many “chunks” you have

3Al2(SO4)3

Subscript numbers tell you the number atoms of the preceding element, there are 2 atoms of aluminum

Here the 4 refers only to the oxygen not the sulfur

Aluminum sulfate is made of:

3 Elements and

17 Atoms

comprehension check
Comprehension Check
  • How many elements and atoms are there?
    • NaCl
      • 2 elements, 2 atoms
    • CH4
      • 2 elements, 5 atoms
    • C6H12O6
      • 3 elements, 24 atoms
    • CaMnO4
      • 3 elements, 6 atoms
    • H2SO4
      • 3 elements, 7 atoms
    • Li3Fe(CN)6
      • 4 elements, 16 atoms