1. January 13, 2016 Today’s Schedule Today you will need: Q/A
Correct Worksheet
Start Periodic Table
Coloring Periodic Table
Pass back test
Today you will need:
Pen/Pencil
Paper/ Notebook
Pencil Crayons if you have them

2. Q/A
Break down the following compound to its elements and how many atoms of each element are there.
3 H2 (CrO4) 2

3. 3 H2 (CrO4) 2
Hydrogen= 3 X 2 = 6 atoms
Cromiun= 3 X 1 X 2 = 6 atoms
Oxygen= 3 X 4 X 2 = 24 atoms

4. Put the mark clearly in the upper right hand corner.
Add up the marks
1 point for each correct element
Worksheet out of /25
Bonus mark for having question 10 correct
Put the mark clearly in the upper right hand corner.

5. Counting atoms worksheet- Marks
CaF2
Calcium= 1 Atom
Fluorine= 2 Atoms
NO2
Nitrogen= 1 atom
Oxygen= 2 atoms
Al2(SO4)3
Aluminum= 2 atoms
Sulfur = 3 atoms
Oxygen =12 atoms
NH4NO3
Nitrogen= 2 atoms
Hydrogen= 4 atoms
Oxygen=3 atoms
S2F2
Sulfur= 2 atoms
Fluorine=2 atoms
Na2CO3
Sodium= 2 atoms
Carbon= 1 atom
Oxygen= 3 atoms

6. Counting atoms Worksheet (Marks)
CH4
Carbon= 1 atom
Hydrogen= 4 atoms
Al(C2H3O2)3
Aluminum= 1 atom
Carbon= 6 atoms
Hydrogen= 9 atoms
Oxygen= 6 atoms
(NH4)2Cr2O7
Nitrogen= 2 atoms
Hydrogen= 8 atoms
Chromium=2 atoms
Oxygen=7 atoms
10) Bonus MARK!
Calcium= 1 atom
Oxygen= 8 atoms
Carbon= 18 atoms
Hydrogen= 14 atoms

7. THE PERIODIC TABLE
AN INTRODUCTION

8. INVENTION OF THE PERIODIC TABLE
DMITRI MENDELEEV invented this table in order to organize the elements
Not only are they organized, they are organized in a way that explains and predicts their physical and chemical properties

9. MENDELEEV
Russian scientist played solitaire with the 64 elements known at the time
He first arranged them in order of increasing atomic mass
When an element started to repeat properties he had seen before, he started a brand new row

10. His table:

11. Mendeleev’s Periodic Law
If the elements are arranged according to their atomic mass, a pattern can be seen in which similar properties occur regularly.

12. Testing his Periodic Law
Mendeleev had predicted that elements would be discovered to fill in the empty spaces in his periodic table
His predictions were found to be accurate
A century later, it is still used to summarize chemical facts

13. Mendeleev
Video

14. The Groups on the Periodic Table

15. GROUPS OF ELEMENTS
A set of elements in the same column (running up and down) are called a CHEMICAL GROUP or FAMILY
These elements have similar physical and chemical properties
They form similar kinds of compounds when they combine with other elements

16. Class Work
Use the handout to colour the different groups of the periodic table.
If you don’t have any pencil crayons, you may borrow mine.
If you borrow mine, put them back after you are finished!