Bonds, Atomic Bonds

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    Bonds, Atomic Bonds - Presentation Transcript

    1. Bonds, Atomic Bonds
    2. Valence Number
      • Number of electrons an atom has in its outer energy level.
      • All atoms want 8 electrons in their outer energy level.
      • A happy and stable atom has 8 electrons in its outer energy level.
      8
    3. Oxidation Number
      • Number of electrons an atom will gain, lose, or share while bonding with another element.
    4. 0 8 Noble Gases 18 -1 7 Halogens 17 -2 6 Oxygen family 16 -3 5 Nitrogen family 15 +4 or -4 4 Carbon family 14 +3 3 Boron family 13 ---- 1 or 2 Transitional Elements 3 -12 +2 2 Alkaline Earth Metals 2 +1 1 Alkali Metals 1 Oxidation Number Valence Number Group Name Group Number
    5. 3 Types of Chemical Bonds
      • Ionic Bonds
      • Covalent Bonds
      • Metallic Bonds
    6. Ions
      • Recall that p + have charge +1, e - have charge -1
        • # p + = # e - : no net charge = neutral
        • # p + > # e - : net + charge = Cation
        • # p + < # e - : net - charge = Anion
    7. Ionic compounds
      • Crystal lattice – strong forces
      • High melting and boiling points
      • Hard, not easily crushed
      • Conduct when melted or dissolved
    8. Covalent compounds
      • Weaker forces between compounds
      • Lower melting and boiling points
      • Volatile liquids and gases
      • Softer – easily crushed
      • Not conductors
      • Ionic
      • Charged particles carry current
      • Lit bulb
      • Covalent
      • No charged particles
      • Unlit bulb
    9. Properties of metals
      • Luster
      • Conductors
      • Malleable
      • Ductile
    10. Lewis Dot Diagram: Elements
      • Shows the number of electrons in the outer energy level of an atom
        • “ valence electrons”
    11. Electron Dot Diagram
      • Symbol surrounded by dots to represent the valence electrons
      Na
    12. LEWIS’ DOT FORMULAS
      • Represent The Outer Shell Only
      • Never More Than 8 Electrons
      • Used To Show How And Why Elements Combine With Each Other

    + Sandra McCarronSandra McCarron, 8 months ago

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    Introduction to Ionic & Covalent bonds, as well as more

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