Chemistry Reference
In-Depth Information
The Electron Configuration and Orbital Notation for an Atom of Sulfur
1s
2
2s
2
2p
6
3s
2
3p
4
valence shell
S
Lewis Dot Notation for Sulfur
Figure 3-6b
For our final example, let's try a chorine (Cl
-
) ion. We didn't do this
example in Lesson 3-4, try it on your own and see if you get the same an-
swer that I show in Figure 3-6c. Remember to go back and do the electron
configuration and the orbital notation first, paying careful attention to the
charge on the ion. Then construct the Lewis dot notation for the ion, and
check it against the answer.
The Electron Configuration and Orbital Notation for a Chlorine (Cl
-
) Ion
1s
2
2s
2
2p
6
3s
2
3p
6
-
Cl
Figure 3-6c
Notice that we include the charge on the ion in our Lewis dot diagram,
in order to differentiate it from the neutral atom. Did you get 8 valence
electrons? If not, go back and review what you do to the atomic number in
order to get the proper number of electrons for an ion.
Lesson 3-6 Review
1.
What do the dots in a Lewis dot diagram represent?
2.
Which electrons are shown as dots in a Lewis dot diagram?
