mercedes's chem cards

Card Set Information

mercedes's chem cards
2011-10-12 15:54:40
chem test 5`

definitions for chem test 2
Show Answers:

  1. A bond that results from the sharing of
    electrons between atoms.
    Covalent Bond
  2. The unit of matter held together by
    covalent bonds.
  3. what creates a net attractive force that binds atoms together?
    the nucleus-electron attractions are greater than the nucleus-nucleus and electron- electron repulsions.
  4. Different samples of a pure chemical
    compound always contain the same proportion of elements by mass.
    Law of Definite Proportions
  5. Elements can combine in different ways to
    form different compounds, with mass ratios that are small whole-number
    multiples of each other.
    Law of Multiple Proportions
  6. •combination
    of at least two
    nonmetal atoms in a specific arrangement held
    together by chemical
  7. shows
    exact number of atoms of each element in a molecule
    • molecular
    • formula
  8. Atoms will gain, lose, or share electrons to
    acquire eight valence electrons
    Octet Rule
  9. The ability of an atom in a molecule to
    attract the shared electrons in a covalent bond. increases from left to right, and down a column.
  10. have unsymmetrical electron distribution in which the bonding electrons are attracted more strongly by one atom then the other.
    polar covalent bonds
  11. A representation of an atom’s valence electrons by using dots and indicates by the placement of dots how the valence electrons are distributed in the molecule.
    Electron-Dot Structures (Lewis Structures)
  12. A quantum mechanical model which shows how electron pairs are shared in a covalent bond.
    Valence Bond Theory