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5 Cards in this Set

  • Front
  • Back
chemical bonds
* form between atoms w/ un-
filled valence shells
covalent bonds
* share valence e-
EX. H2 and O2: molecules they have definite size and # of molecules
* H2O and CH4: compounds
* equal sharing of e-: non-
polor covalent bonds
between atoms of same
electronegativity
* unequal sharingof e-: polor
covlent bond
between atoms of different
electronegativity
Oxygen has a high electro-.
* bonding capacity (usually
the # of unpaired e- in the
valence shell
* covalent bonds are strong
bonds.
Ionic bonds
weak
* a highly electronegative
atom strips e- away from
its partner.
EX. charged atoms or
molecules are ions
- charge: anion
+ charge: cation
* ionic bonds: salt
lack a definite size and #
of atoms
EX. MgCl2
* strong in dry enviroments
weak chemical bonds
* ionic bonds in aqueous
enviroment
* Hydrogen bonds
H that is covalently
bonded to more electro-
atoms is attracted to
electro- atom of another
molecule.
* Van der Walls Interaction
random movement of e- (s)
providing asymmetry in
e- distribution = area of
charge
molecular shape and function
* shape is determined by position of atoms orbitals
* molecular shape dictates function