Structure Of The Atom 2

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Structure Of The Atom 2

  1. 1. Structure of the Atom
  2. 2. The Atom <ul><li>The atom is the smallest part of any element that retains all of the properties of that element. </li></ul><ul><li>The atom is made up of: </li></ul><ul><li>protons (+) </li></ul><ul><li>electrons (-) </li></ul><ul><li>neutrons (0) </li></ul><ul><li>The central core of the atom is called the nucleus , containing protons and neutrons. (Nucleus charge = +) </li></ul>
  3. 3. The Atom <ul><li>PROTONS </li></ul><ul><li># protons = atomic # </li></ul>
  4. 4. The Atom <ul><li>ELECTRONS </li></ul><ul><li># electrons = # protons </li></ul>
  5. 5. The Atom <ul><li>NEUTRONS </li></ul><ul><li># neutrons = atomic mass - </li></ul><ul><li>atomic # </li></ul>
  6. 6. In your notebook, determine the number of protons, electrons, and neutrons for the following elements: <ul><li>Oxygen </li></ul><ul><li>Argon </li></ul><ul><li>Magnesium </li></ul><ul><li>Neon </li></ul><ul><li>Nitrogen </li></ul><ul><li>Chlorine </li></ul>17 18 17 7 7 7 10 10 10 12 12 12 18 22 18 8 8 8 Electrons Neutrons Protons
  7. 7. The Atom <ul><li>The electrons are located in energy levels around the nucleus. </li></ul>
  8. 8. Electron Fill Rule (2-8-8 rule) <ul><li>Electrons fill energy levels as follows </li></ul><ul><ul><li>First Energy Level = 2 electrons </li></ul></ul><ul><ul><li>Second Energy Level = 8 electrons </li></ul></ul><ul><ul><li>Third Energy Level = 8 electrons </li></ul></ul>
  9. 9. Let’s Practice <ul><li>Oxygen </li></ul><ul><li>Argon </li></ul><ul><li>Magnesium </li></ul><ul><li>Neon </li></ul><ul><li>Nitrogen </li></ul><ul><li>Chlorine </li></ul>http://www. chemicalelements .com/

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