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The Covalent Bond and Molecular Compounds

The Covalent Bond and Molecular Compounds

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The Covalent Bond and Molecular Compounds

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  1. The Covalent Bond and Molecular Compounds Chemistry Mrs. Coyle

  2. The Periodic Table and Atomic Radius

  3. Types of Bonds • Ionic • Metallic • Covalent

  4. The Covalent Bond • The bond in which atoms are held together by their mutual electrical attraction for shared electrons. Fluorine

  5. Movie Clip • http://www.youtube.com/watch?v=Kj3o0XvhVqQ&NR=1

  6. The Covalent Bond • A single covalent bond is made up of two electrons. • The covalent bond is represented using a straight line. F — F F F

  7. Molecule • A neutral group of atoms joined together by covalent bonds.

  8. Diatomic Molecules • Molecules made up of two atoms. • There are 7 diatomic molecules. • H2, N2, O2, F2, Cl2, Br2, I2

  9. Hydrogen H· + ·H  H:H Hydrogen Hydrogen Hydrogen Atom Atom molecule • The hydrogen molecule has a single covalent bond. • The electronegativity of each hydrogenatom is the same, so the electrons are shared. Shared electron pair

  10. Molecular Compounds • Compounds comprised of molecules.

  11. Molecular Formula • A molecular formula is a chemical formula that is used for molecular compounds. • It shows the types and number of atoms in a molecule. • Note that ionic compounds used the chemical formula called the formula unit. • A molecular formula does not give information about the molecules structure.

  12. Structural Formula • Structural formulas show the arrangement of atoms in a molecule. • In a structural formula, the electron pair is represented by a line • Example: H-H (single bond: one pair of electrons)

  13. Space Filling Model Methane CH4

  14. Ball and Stick Models Ethane C2H6

  15. The Water Molecule

  16. The Ammonia Molecule . NH3