1. Lon-Capa 6th HW assignment due Friday, 11/4, 5 pm. It is open now.
5th Quiz due Sunday, 11/13 by 10 pm. It will open Friday, 11/11 at 5 pm.

2. Clicker Question
Consider different “sodium particles” (atom or ions) in separate evacuated containers. Which of the following sodium species is lowest in energy?
a) Na
b) Na+
c) Na2+
d) Na
e) Na2

3. Clicker Question
Consider different “oxygen particles” (atom or ions) in separate evacuated containers. Which of the following oxygen species is lowest in energy?
a) O
b) O+
c) O2+
d) O
e) O2

4. Clicker Question
Consider different “oxygen particles” (atom or ions) in separate evacuated containers. Which of the following oxygen species is second lowest in energy?
a) O
b) O+
c) O2+
d) O
e) O2

5. Four Trends to Understand
Atomic radius
Ionization Energy
Energy required to remove an electron from a gaseous atom (or cation).
Electron Affinity
Energy change associated with the addition of an electron to a gaseous atom or ion.
Electronegativity
Ability of an atom in a molecule to attract shared electrons to itself.

7. IE vs. Atomic Number

8. Successive IEs

9. EA vs. Atomic Number