1. What does an atom looks like?
Atoms
What does an atom looks like?
What needs to be in each drawing? 1

2. Aluminum Activity
How big is an atom?

3. Aluminum Activity On a piece of paper:
Write ‘Aluminum Activity’ at the top
2. If the diameter of one Al atom is 2.5x10-8 cm, how many atoms thick is a piece of aluminum foil?
Get together with your cheese-it group from day 1. Make a guess as to how many atoms thick a piece of aluminum foil is.
Write the number on your sheet as a ‘hypothesis’

4. You have 30 minutes: Write a basic procedure for your experiment
2. Record all of your data, calculations in detail, and answer
Write your final answer on the board
3. Explain the error in your answer and where there is room to improve your lab

5. Elements To Know On page 51 in the book

6. Homework Your homework: Make flashcards for elements in Table 3.3
QUIZ FRIDAY
Name
Symbol
Approximate Location on Table

7. Unit 1 Test Results Originally out of 85 Test is now out of 80
Large number missed 9
Large number missed 2
Sig Figs on number 16
Test is now out of 80
Old score: 75/85
New score: 75/80

8. Unit 1 Test Results
Average: 62/80 = 78%
Median: 66/80 = 83%

9. Results

10. Test Corrections Separate Assignment
EVERYONE completes the corrections
On a separate sheet of paper for each missing question:
What is the correct answer
Explain the correct answer or explain where you made a mistake

11. Test Corrections If you finish: If you DON’T finish:
Staple your new work to the front of your test and put in the ‘done’ bin
If you DON’T finish:
Staple your new work to the front of your test and put in the ‘need more time’ bin
You will NOT be given more time in class to work. Turn in test before you leave
Test Corrections due: Friday by 7:30 am

13. Logical Ordering
I need 3 volunteers

14. History
Dmitri Mendeleev
1896

15. Developed the modern periodic table
Seaborg
Developed the modern periodic table

16. The Whole Periodic table

17. Groups vs. Periods Need to Know: Halogens Noble Gas Alkali Metals
Alkali Earth Metals
Transition Metals
Lanthanides
Actanides
Groups: Up and Down
Periods: Left to Right

18. Metals vs. Non-metals Metals Metalloids Non-Metals Form
Generally solid, some liquid at room temp
Solid
Generally gas
Conductivity
High to moderate
Moderate
Poor
Density
generally High
Low
Examples
Copper, Sodium, Silver, Gold
Boron, Germanium, Arsenic
Hydrogen, Helium, Neon

19. Location of Metalloids

20. Periodic Table Atomic Number Name Atomic Mass Symbol
Number of protons
Symbol
What is it telling you?
Name
**Mass Number can not be found on the periodic table
Atomic Mass
Average Mass of an Atom 20

21. Natural State of an Element
Diatomic Elements
Monatomic Gases
Liquids
Solids
Gases