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<ul><li>Notes: Compounds </li></ul><ul><li>CW: Counting Atoms </li></ul><ul><li>H: Chemical Compounds </li></ul>
Compounds January 15, 2009
Objectives <ul><li>Define compound, molecule, chemical formula, diatomic molecule </li></ul><ul><li>Write and decipher a c...
<ul><li>Atoms combine together to form most of the substances we observe in the world around us.  </li></ul><ul><li>Compou...
+ <ul><li>Sodium + Chlorine = Salt </li></ul>=
Molecule   <ul><li>The smallest piece of a compound is that still has all of the properties of the compound. </li></ul>
<ul><li>Chemical Formulas: </li></ul><ul><li>The  subscripts  to the right of the letters tell you  HOW MANY ATOMS  of eac...
<ul><li>If there is a number in front of the formula, it tells you how many  MOLECULES  of that substance:   </li></ul><ul...
<ul><li>C 6 H 12 O 6 </li></ul><ul><li>3CO 2 </li></ul><ul><li>Ba(NO 3 ) 2 </li></ul>2Al 2 (SO 4 ) 3
diatomic molecule When an element consists of two identical atoms it is called  DIATOMIC  molecule.  O 2 7 elements are al...
 
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2009 Compounds2

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Transcript of "2009 Compounds2"

  1. 1. <ul><li>Notes: Compounds </li></ul><ul><li>CW: Counting Atoms </li></ul><ul><li>H: Chemical Compounds </li></ul>
  2. 2. Compounds January 15, 2009
  3. 3. Objectives <ul><li>Define compound, molecule, chemical formula, diatomic molecule </li></ul><ul><li>Write and decipher a chemical formula </li></ul>
  4. 4. <ul><li>Atoms combine together to form most of the substances we observe in the world around us. </li></ul><ul><li>Compounds - two or more atoms chemically joined together to form a new substance with very different properties than the elements of which it is formed. </li></ul>
  5. 5. + <ul><li>Sodium + Chlorine = Salt </li></ul>=
  6. 6. Molecule <ul><li>The smallest piece of a compound is that still has all of the properties of the compound. </li></ul>
  7. 7. <ul><li>Chemical Formulas: </li></ul><ul><li>The subscripts to the right of the letters tell you HOW MANY ATOMS of each element. If there isn’t one, it means that there is one atom of that element. </li></ul><ul><li>H 2 O </li></ul>
  8. 8. <ul><li>If there is a number in front of the formula, it tells you how many MOLECULES of that substance: </li></ul><ul><ul><li>4H 2 O </li></ul></ul><ul><li>This number is called the coefficient. </li></ul>
  9. 9. <ul><li>C 6 H 12 O 6 </li></ul><ul><li>3CO 2 </li></ul><ul><li>Ba(NO 3 ) 2 </li></ul>2Al 2 (SO 4 ) 3
  10. 10. diatomic molecule When an element consists of two identical atoms it is called DIATOMIC molecule. O 2 7 elements are always found as diatomic molecules - I odine, H ydrogen, N itrogen, B romine, O xygen, C hlorine, F luorine I H ave N o Br ight O r Cl ever F riends
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