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7th Grade Chapter 4 Lesson 4
7th Grade Chapter 4 Lesson 4
7th Grade Chapter 4 Lesson 4
7th Grade Chapter 4 Lesson 4
7th Grade Chapter 4 Lesson 4
7th Grade Chapter 4 Lesson 4
7th Grade Chapter 4 Lesson 4
7th Grade Chapter 4 Lesson 4
7th Grade Chapter 4 Lesson 4
7th Grade Chapter 4 Lesson 4
7th Grade Chapter 4 Lesson 4
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7th Grade Chapter 4 Lesson 4

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For Student Use Only

For Student Use Only

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  • 1. Pg. 141-144 For Student Use Only
  • 2. Chemistry is the study of the composition, structure, and properties of matter and the changes matter undergoes.
  • 3. Mixtures and Compounds <ul><li>Salt and Pepper mix but still taste different and look different. </li></ul>
  • 4. Mixtures and Compounds <ul><li>Hydrogen and Oxygen make water. </li></ul><ul><li>Sodium and Chlorine make table salt. </li></ul>
  • 5. <ul><li>Valence Electrons: </li></ul><ul><ul><li>The electrons in the outermost shell </li></ul></ul><ul><ul><li>Atoms seek to have 8 electrons in their outer shells </li></ul></ul><ul><li>Electron Shells: </li></ul><ul><ul><li>1 st shell= 2 </li></ul></ul><ul><ul><li>2 nd shell= 8 </li></ul></ul><ul><ul><li>3 rd shell= 18 </li></ul></ul>Chemical Bonding
  • 6. Valence electrons lead to bonding.
  • 7. Chemical Bonding <ul><li>Opposite charges attract and this leads to ionic Bonding. </li></ul>
  • 8. Chemical Bonding <ul><li>Examples of Ionic Bonding </li></ul><ul><li>NaCl </li></ul><ul><li>(Sodium Chloride) </li></ul>
  • 9. Chemical Bonding <ul><li>Examples of Covalent Bonding: </li></ul><ul><li>Water </li></ul><ul><li>(Hydrogen bonds to Oxygen) </li></ul>
  • 10. Chemical Reactions <ul><li>This describes the reaction that forms. </li></ul><ul><li>Baking a cake is creating a series of chemical reactions. </li></ul>
  • 11. Chemical Breakdown <ul><li>Example: </li></ul><ul><li>Electrolysis is used to break water molecules apart. </li></ul><ul><li>Nitrogen Cycle breaks down nitrogen bonds. </li></ul>

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