Chemical Bonding Worksheets Page 17
ADVERTISEMENT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22MOLECULES WHERE CENTRAL ATOM HAS ONE OR MORE LONE PAIRS
Lone pairs of electrons take up more space than bonded pairs of electrons because the
bonded pair are held by two atoms whereas the lone pair is held only by one atom.
A=central atom
X=outer atoms
E=lone pairs
Table of Molecular Shapes and Bond Angles (with lone pairs) Part II
General
# of Outer
# of lone pairs
MOLECULAR
NAME of
Bond
formula
Atoms
on Central Atom
GEOMETRY
SHAPE
Angles
bent or
AX
E
2
1
<120˚
2
angular
<120°
trigonal
AX
E
3
1
<109.5˚
3
pyramid
<109.5°
bent or
AX
E
2
2
<109.5˚
2
2
angular
<109.5°
Given any molecule or polyatomic ion, be able to determine the Lewis Structure, then
determine the general formula (e.g. AX
E
) to identify the corresponding molecular
2
2
geometry (or shape) and bond angle(s) for the molecule.
CHEM 121 Tro Chapter 10 F2012
page 17 of 22
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Education