chem ch 9

  1. what is it called when atoms tend to react chemically so as to achieve a noble-gas electron configuration, either by losing or gaining electrons or by sharing electrons with other atoms
    octet rule
  2. what rule is considered the "driving force" that causes elements to react to form chemical bonds
    octet rule
  3. a chemical bond in which positively charged ions are electrically attracted to negatively charged ions
    ionic bond
  4. an attractive force between atoms that is strong enough to enable the group to act as a unit
    chemical bond
  5. when two atoms share a single pair of electrons
    single covalent bond (single bond)
  6. sharing two pairs of electrons
    double bond
  7. sharing three pairs of electrons
    triple bond
  8. electrons that circulate freely through the molecule instead of being bound to a single atom or pair of atoms
    delocalized electrons
  9. bonding situation in which electrons are shared by more that two atoms
  10. a chemical bond that results from the sharing of valence electrons between atoms
    covalent bond
  11. chemical bonds that bind atoms together
    metallic bonds
  12. a covalent bond in which both atoms share electrons equally
    nonpolar bond
  13. a covalent bond in which electrons are shared unequally between atoms
    polar bond
  14. a bond or molecule that has a negative end and a positive end
  15. aufbau principle
    specifies the order in which subshells fill with electrons
  16. periodic law
    what states that the physical and chemical properties of the elements are periodic functions of their atomic numbers
  17. Pauli exclusion principle
    what principal states that no two electrons in an atom may have the same set of four quantum numbers
  18. uncertainty principle
    what states that it is impossible to simultaneously determine the momentum (mass times velocity) and the position of an electron with precision
  19. Hund's rule
    when a p, d, or f subshell is being filled, one electron will occupy each orbital in that subshell before pairing begins
  20. which bond has cations attracted to anions
  21. what bond has a large number of freely circulating electrons among many atoms
  22. looking much like a tripod with a hydrogen atom at the end of each "leg" and the nitrogen atom sitting at the top
    trigonal pyramidal
  23. molecules in which three atoms are arranged in a strait line are said to have what geometry
    linear geometry
  24. what geometry has three bonding pairs of electrons that are arrayed around the central atom
    trigonal planar
  25. the force between neighboring polar molecules due to the attraction of oppositely charged ends
    dipole-dipole force
  26. only type of intermolecular force that affects nonpolar molecules
    London forces
  27. weak intermolecular forces resulting from instantaneous dipoles in molecules
    London forces
  28. solids that have no ordered arrangement or pattern for the particles that compose them

    (arranged randomly)
    amorphous solids
  29. solid characterized by particles arranged in a regular and repeated three dimensional pattern
    crystalline solid
  30. the simplest repeating unit in a crystal
    unit cell
  31. what types of close-packed unit cells do most metals assume
    face-centered cubic (cubic close packing)
  32. another name for face-centered cubic
    cubic close packing
  33. able to move freely in certain directions while retaining a degree of order in others
    liquid crystals
Card Set
chem ch 9
A Beka 12th grade chem/science