Polarity Flashcards
(32 cards)
Is the molecule symmetrical? No
Polar
Is the molecule symmetrical and the terminal atoms are the same? Yes
Nonpolar
Is the molecule symmetrical and the terminal atoms are the same? Symmetrical-yes, no for same terminal atoms
Polar
Is the molecule a Hydrocarbon?yes
nonpolar
When creating the Lewis structure, which elements always go on the outside?
Hydrogen
which elements are always in the center?
those that are the least electronegative
Linear has what bond angle?
180 degrees
Trigonal planar has what bond angle?
120 degrees
Tetrahedral
109.5
Trigonal Pyramidal
107
Bent
104.5
Which shapes are asymmetrical?
trigonal pyramidal and bent
equal pull
nonpolar covalent
one pulls much stronger than the other
ionic
all ionic compounds are polar?
yes
one element pulls slightly more than another?
polar covalent
Electronegativity difference
how much more one element is electronegative than another
greater than 1.7
mostly ionic
0.4-1.7
polar covalent
less than 0.4
mostly covalent
0
nonpolar covalent
Boron exception?
it is fine with 6 valence electrons
Resonance structure?
more than one possible lewis structure
What is a temporary dipole?
a dispersion force
