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Chemical Bonding
 

Chemical Bonding

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    Chemical Bonding Chemical Bonding Presentation Transcript

    • Chemical Bonding
    • 3 Types of Bonding
      • Ionic Bonding
      • Covalent Bonding
      • Metallic Bonding
    • Ionic Bonding
      • Ionic bonding is an electrical attraction between two oppositely charged atoms.
      • Lose an electron Atom is Positive
      • Gain an electron Atom is Negative
      • Positive Ion is called Cation
      • Negative Ion is called Anion
    • Characteristics of Ionic Compounds
      • 1) Crystalline solid at room temperature
      • 2) Have higher melting and boiling points compared to covalent bonds.
      • 3)Conduct electrical current in solution state.
      • 4)Extremely polar bonds.
      • 5)Most are soluble in water.
    • Magic #
      • The magic number is 8
      • Every atom wants to gain electrons up to 8, or lose electrons to equal zero, In order to be stable just like the noble gases
      • Exception= Hydrogen= only needs two electrons
    • Helpful Hint
      • An easy way to check if a bond is Ionic:
      • One atom must be from group 1, 2, or 13 on the periodic table and the other atom from groups 14-17.
    • Oxidation Number (Charge) Group 1 2 13 14 15 16 17 18 Charge +1 +2 +3 -4 -3 -2 -1 0
    • Covalent Bonds
      • Covalent Bonds are formed as a result of the sharing of one or more pairs of bonding electrons. Each atom donates half of the electrons to be shared.
    • 2 forms of covalent bonds
      • 1) Polar Covalent - unequal sharing of electrons
      • 2) Non-Polar Covalent – equal sharing of electrons between atoms.
    • Single Covalent Bond
      • A single covalent bond would be the sharing of two electrons between the 2 bonded atoms.
      • H-H H-Cl F-F
      • The dash line is symbolic of the bonding pair.
    • Double Covalent Bond
      • A double covalent bond is 2 pairs of electrons being shared.
      • O=O C=O
    • Triple Covalent Bond
      • A triple covalent bond is the sharing of 3 pairs of electrons.
      • N = N C = C C = N
    • Metallic Bond
      • The metallic bond occurs only between 2 metal atoms. In this type of bond the valence electrons are free to move about the electron clouds of all metals participating in the bond.