Copyright © 2008 Pearson Prentice Hall, Inc.
Chapter 7/
17
Electron-Dot Structures of
Polyatomic Molecules
Draw an electron-dot structure for
H
3
O
1+
.
3(1) + 6
- 1
= 8 valence electrons
Step 4:
Step 1:
Step 2:
H
O
H
H
H
O
H
H
1+
Step 1: Subtract 1 from the total number of valence because of the 1+ charge.
Step 3: The terminal atoms are hydrogen.
Step 5: The central atom has an octet so no multiple bonding.
Don’t forget to show the charge on the ion!