Chemical Bonding

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Chemical Bonding
2013-06-15 10:57:00

Chemical Bonding definitions
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  1. Compound
    a substance that is made up of two or more different elements combined together chemically
  2. Octet Rule
    states that when bonding occurs, atoms tend to reach an electron arrangement with 8 electrons in the outermost shell
  3. Ionic Bond
    the force of attraction between oppositely charged ions in a compound
  4. Covalent Bond
    formed when two atoms share a apair of electrons
  5. Transition Metal
    one that forms at least one ion with a partially filled sub level
  6. Molecule
    a group of atoms joined together: it is the smallest particle of an element oor compound that can exist independently
  7. Sigma Bond
    a covalent bond formed by the head-on overlap of (any) two atomic orbitals; includes all single bonds
  8. Pi bond
    occurs where two p orbitals overlap sideways; happens in double and triple bonds
    The theory states that the shape of a molecule  depends on the number of pairs of electrons in the valence shell of the central atom
  10. Electronegativity
    the relative attraction that an atom in a molecule has for the shared pair of electrons in a covalent bond
  11. Pure covalent
    Shares electrons in a covalent bond equally 
  12. Polar covalent
    Shares electrons in a covalent bond unequally
  13. Intramolecular Bonding
    bonds that hold atoms or ions together within the molecule or crystal lattice (i.e. ionic covalent bonds)
  14. Intermolecular Bonding
    bonds that exist between one molecule and another
  15. Van der Waals forces
    weak attractive forces between the molecules resulting from the formation of temporary dipoles
  16. Dipole-dipole forces
    forces of attraction that exist between the negative pole of one molecule and the positive pole of another
  17. Hydrogen bonding
    arises when an atom of hydrogen is bonded to a small very electonegative atom like nitrogen oxygen, or flourine