1. Welcome! (10/31 and 11/2) 99 You’ll need your Periodic Table to:
On desk: Blue atoms inquiry WS, Atoms WS #1
You’ll need your Periodic Table to:
Identify the number of protons, neutrons, and electrons in the symbol to the right:
Give the atomic symbol for an ion with:14 protons, 11 neutrons, and 12 electrons 99 Tc

2. Homework Questions?
Keys will be on Moodle, of course!

3. Scale of the Universe
How cool is this?

4. Some Terms for Your Notes
Mass number
Atomic number
Atomic mass
Atom
Ion
Isotope

5. Practice!
Assume, in the picture below, that protons are blue and neutrons are red.
Give the full symbol
Atom or ion?
Give an example of an isotope of this element

6. Part 2 of Atomic Inquiry What does weighted average mean?
Natural abundance?

7. Lab 6: (Weighted) Average Atomic Mass Simulations
What do those numbers on the periodic table MEAN? Where do they come from?
Lab 6: Simulations Time!
When done, do the practice problems on page 2

8. Homework Day 4 Finish Lab 6 if you didn’t finish in class. Atoms WS #2
Suggested reading: pg
Finish Test 1 corrections at lunch Thursday or Friday!
Practice quiz next class!