11-23 Bell Work
1. Draw the Lewis structure for
dihydrogen monoxide
2. What is H2CO3 called?
Draw me!
1. Dicarbon dihydride
2. Dicarbon hexahydride
*hint: put C’s in the middle
and H’s on the outside!
Metal
Ionic Bond = _________
+
Nonmetal
___________
we use the
_______
_______
Cross
Criss
Nonmetal
Covalent = ________
+
Nonmetal
_________
we use ________
Prefixes
Acids – If only two elements
Hydro- “name”___
-ic
_____
-ic
If more than two “name”____
Molecular Shapes- why
does it matter?
• How many “tastes” does your
tongue recognize?
• p.262
Molecular Shapes- how is
it determined?
• Electrons repel each
other
• Based on the arrangement
that minimizes
repulsion
____________
between
shared and unshared
electron
________pairs
around the
central atom
VSEPR Model
V_______
Shell
alence
lectron
epulsion
E________Pair
R________
Model
http://wikis.lawrence.edu/display/CHEM/28+-+Dick++Limitations+of+our+models.
 CO2
Trigonal Planar
Tetrahedral
CH4
1. Draw Lewis structure
2. Determine # of PAIRS (bonded
or unbonded) around CENTRAL
atom
3. Count any unshared e- pairs on
central atom
CO2
H
Cl
1 bonding site
2 bonding sites
Making shapes
•
•
•
Draw Lewis structure for CO
Make it with your gumdrops
Draw a picture of it
• Name shape and bond angle
Linear, 180o
Draw Lewis, make it, draw it
1.
2.
3.
4.
Boron trihydride
Carbon tetrahydride
Nitrogen trihydride
Hydrosulfuric acid
Bond
Sites
1 or 2
3
4
4
UnHybrid
share
s
d
0
0
0
1
sp
2
sp
sp
3
3
sp
3
Shape
Line
ar
Trigonal
planar
Tetrahed
ral
Trig.
pyramida
l
Bent
Time for toys!!
tetrahedral
109.5
Trig. planar
120
bent
104.5
Trig. pyramidal
107.3
Trig. pyramidal
107.3
Make these little guys and tell
me the shape!
H2S
HF
CF4
Exit SlipCompare and contrast ionic
bonds and covalent bonds
based on…
-how they form
-what elements are
involved
-how they’re named