Chemical Bonding Worksheets Page 4
ADVERTISEMENT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
2210.4 COVALENT LEWIS STRUCTURES: Electrons Shared
Nonmetal atoms form bonds to achieve a Noble Gas electron configuration.
– However, instead of taking electrons away from one another to form ions, they simply share
the electrons in a covalent bond.
covalent bond: sharing of a pair of electrons between two nonmetal atoms
– achieved by overlapping outermost subshells that contain the valence electrons
Molecules (or molecular compounds) are held together by covalent bonds.
basic unit of a compound of covalently bonded atoms
molecule:
– Consider the HCl, H
O, NH
, and CH
molecules below
2
3
4
– Note how the formula for each gives the actual number of each atom
present in the molecule.
Ex. 1: Use electron dot formulas to represent the reaction described.
→
hydrogen atom
+
hydrogen atom
H
molecule
2
–
Note in H
, each H atom now has 2 e
(like He).
2
We can also represent the H
molecule as follows:
2
H
H
This overlapping region is the covalent bond where electrons are shared.
CHEM 121 Tro Chapter 10 F2012
page 4 of 22
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Education