Chemical Bonding Flashcards
(29 cards)
Electronegativty for non-polar
0-0.4
Electronegativity for polar
0.5-2.4
Electronegativity for ionic
Above 2.4
How many degrees is linear?
180
How many degrees is trigonal planar?
120
How many degrees is tetrahedral?
109.5
How many degrees is trigonal pyramidal?
About 105-109.5
How many degrees is bent?
About 105-109.5
Linear molecules are usually _____
Nonpolar
H2O is _____
Polar, bent
Nonpolar molecules are usually ____
Symmetrical
Two identical polar vonds in opposite directions will cancel
Nonpolar
Two polar bonds eith an angle of less than 180 between them will not cancel
Polar
Three identical polar bonds at 120 from each other will cancel
Nonpolar
Four identical polar bonds un a tetrahedral arrangement (109.5 from each other) will cancel
Nonpolar
Three polar bonds in a trigonal pyramidal arrangement (109.5) will not cancel
Polar
In all cases where the polar bonds cancel the bonds are assumed to be identical. True of false?
True
If one or more of the bonds are different than the other(s) the bonds will not cancel
Polar
When the bonds cancel eachother out they are polar. True or false
False
A bond is ___ if the two bonding atoms have different electronegativities
Polar
If there are not polar bonds the molecule is ____
Nonpolar
Polar and nonpolar molecules depend on 2 factors which are what?
Symmetry of shape and bond polarity
Molecules without positive and negative side. Polar or nonpolar?
Nonpolar
Asymmetrical ex. Bent. Polar or nonpolar?
Polar
