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Counting Atoms Day

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Counting Atoms Day

  1. 1. Today in Science <ul><li>You Will Need: </li></ul><ul><ul><li>Pencil, Text book Open to P.T. </li></ul></ul><ul><ul><li>Counting Atoms Bookshelf –2sheets – 3 sides – Please Staple. </li></ul></ul><ul><ul><li>Log #4 – Update On-line </li></ul></ul><ul><ul><li>Progress Notice Due Today </li></ul></ul><ul><ul><li>Complete Oral Presentations Today </li></ul></ul>
  2. 2. Oral Presentations <ul><li>Atom Model </li></ul><ul><ul><li>Describe materials used to make model </li></ul></ul><ul><ul><li>Tell # of protons, neutrons and electrons </li></ul></ul><ul><ul><li>Tell What type of Atom </li></ul></ul><ul><ul><li>Tell What state at room temp. </li></ul></ul><ul><li>Your ELEMENT </li></ul><ul><ul><li>Talk to us about your element using your visual presentation </li></ul></ul>
  3. 3. Atoms : Building Blocks of Matter The formula for a compound indicates the elements that make up the compound and the number of atoms of each element present in that specific compound. These numbers of atoms are indicated by the use of small numbers called subscripts . Sometimes groups of atoms act as a group of atoms. Such a group of atoms is called a polyatomic ion.
  4. 4. Atoms : Building Blocks of Matter When a subscript appears outside the parentheses , it indicates that all the elements inside the parentheses should be multiplied by that subscript. Fe(OH) 3
  5. 5. Counting Atoms <ul><ul><li>Calcium Carbonate = Limestone </li></ul></ul><ul><li>Ca C O 3 </li></ul>Ca = Calcium = 1 C = Carbon = 1 O = Oxygen = 3
  6. 6. Counting Atoms <ul><ul><li>Magnesium Hydroxide </li></ul></ul><ul><li>Mg (O H) 2 </li></ul>Mg = Magnesium = 1 O = Oxygen = 2 H = Hydrogen = 2
  7. 7. Counting Atoms Trinitrotoluene = (TNT) explosive C 7 H 5 (NO 2 ) 3 C= Carbon = 7 H = Hydrogen = 5 N = Nitrogen = 3 O = Oxygen = 6
  8. 8. Counting Atoms As you look over these compounds you may observe that many of them contain similar _________ of elements. Since we are a ______________ based environment, carbon is found in all living organisms. The elements in the Human Body can be broken down to include the main elements of Hydrogen, Oxygen, Nitrogen, Carbon and representatives from about 20 other elements. atoms carbon
  9. 9. Counting Atoms The _ ____ ____ main elements that make up most living organisms are Carbon, ________________, Sulfur, __________________, Oxygen and _____________. Phosphorus SIX Hydrogen Nitrogen
  10. 10. <ul><li>Mass Unit Label =_______________ </li></ul><ul><li>Volume Unit Labels = ________, _______ or _______as a unit label </li></ul><ul><li>Density unit label = ___________, ________ or __________ </li></ul>grams mL cm 3 cc g/cm 3 g/mL g/cc Complete the Chart
  11. 11. Grading Math Problems in Science <ul><li>5 points given: </li></ul><ul><li>2 points for the problem you are inputting into the calculator </li></ul><ul><li>2 points for the answer rounded to the nearest hundreth </li></ul><ul><li>1 point for the unit label </li></ul>
  12. 12. <ul><li>Counting Atoms – Due Tomorrow </li></ul><ul><li>Anything you still owe me…. </li></ul>Homework

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