1. Warm up (11/7 and 8) Atoms HW #3 out on desk, please.
See if you are ready for the quiz:
Imaginary element Romium has four isotopes. One has a mass of amu and makes up 71.5% of the isotopes. A second weighs amu and makes up 10.0%, a third weighs amu and makes up 5.6%, and the fourth weighs amu and makes up the rest of the isotopes on earth.
What is the atomic mass of Romium?
amu

2. Up to 30 minutes! Go over HW WS #3 Then, quiz time!
My periodic table and my calculator for your use!
Up to 30 minutes!

3. Back to Atomic History

4. From Nuclear back to the whole atom…Niels Bohr (1920s)

5. Back to ATOMIC THEORIES and HISTORY!
BBC Video Clip
From Rutherford to Bohr!
New model of the atom
20-28 min

6. Rutherford versus Bohr Models

7. Niels Bohr: Theories (1920s)
Electrons are in “orbits” around the nucleus
Color comes from changes in “orbits”
This can be shown through different colors given off by different elements

8. Where does color and light come from?
ELECTRON MOVEMENT gives off energy, which is seen as colorful light!

9. Lab #7: Light Lab!
Guiding Question: Does Bohr’s model work for all atoms?
Pre-lab now: Fill out the data boxes (11 of them) before you come to class so we’re ready to go!

10. Homework Day 6 Light Lab #7
Handout read entirely
Pre-lab finished (all boxes prepped and ready to go for next class!)
If you have your own colored pencils, bring them for NEXT CLASS!