1. Do Now
Write the electron configuration for zinc, using orbital notation (include electron spins).

2. Electrons: The Final Chapter
Mr. Quinn and Ms. Tom
Williamsburg High School for Architecture and Design
10/22/13

3. Aim
How do atoms absorb energy?

4. Definitions Ground state Excitation Excited state Emission
Lowest energy state
Excitation
Absorbing energy
Excited state
High energy state
Emission
Releasing energy

6. An Example: Gallium

7. Pick an atom, an excited atom!

8. The Case of Singlet Oxygen

9. A New Solar Cell?
Model 413 has electrons jumping a shorter distance than the old model
Model 413 absorbs green light, the old model absorbs violet

11. Problem 1:
When electrons in an atom in an excited state fall to lower energy levels, energy is
absorbed, only
released, only
neither released nor absorbed
both released and absorbed

12. Problem 2:
Compared to a sodium atom in the ground state, a sodium atom in the excited state must have
a greater number of electrons
a smaller number of electrons
an electron with greater energy
an electron with less energy

13. Problem 3:
Which is an electron configuration of a fluorine atom in the excited state?
1s22s22p4
1s22s22p5
1s22s22p43s1
1s22s22p53s1

14. Problem 4:
Which is a possible electron configuration for argon in the excited state?
1s22s22p73s23p5
1s22s32p53s23p6
1s22s22p63s13p7
1s22s22p63s23p54s1

15. Problem 5:
Which electron configuration represents an atom in an excited state?
2-6
2-7
2-7-1
2-8-1