1. Don’t worry! It will not be boron.
The Periodic Table
Don’t worry! It will not be boron.

2. Activity One Sort your cards! -Card sorting -Dimitri Mendelev
-Table Colouring

3. Periodic Table History
Developed the table in 1869 with only 63 known elements
Grouped by similar chemical and physical properties hence irregular shape of table
Left empty spaces, predicting future elements to be discovered
With the empty spaces you could also predict the properties of these elements
Periodic Table History

4. IF YOU LOSE YOUR PERIODIC TABLE

5. I make bad chemistry puns… PERIODICALLY

6. Recall: What is an element?

7. Elements Currently there are 118 known elements
Periodic table organizes all the elements!
Each element is noted by an Element Symbol
Elements
Some periodic tables do not have all 118 elements depending when they are made
For Grade 9 Science we will mostly be working with the first 20 elements (you will not have to memorize them)
Element Symbol is one or two letter notation that is used on the table
Often comes from the Latin words for the elements
These are the building blocks of all substances but the amount of them in the world vary
For example, only five elements account for over 90% of the Earth's crust: oxygen, silicon, aluminum, iron, and calcium.
In contrast, just three elements (oxygen, carbon, and hydrogen) account for over 90% of the mass of the human body.

8. Element Symbol One or two letters
First letter is CAPITALIZED, and second letter is LOWERCASE
H - Hydrogen
Na - Sodium
Cl - Chlorine
Element Symbol

9. IF YOU LOSE YOUR PERIODIC TABLE

10. Recall: What is a compound?

11. H2O Compound Notation Symbol for the element hydrogen
Symbol for the element oxygen
H2O
Compound Notation
The small number (subscript) after the element tells us the number of atoms of that element. (There are 2 atoms of hydrogen in this compound)
If there is no small number (no subscript) after the element, there is only 1 atom of that element. (There is 1 atom of oxygen in this compound)

12. Families and Periods Family: The columns of a periodic table
Labelled 1-18
Alkali metals, alkaline earth metals, halogens, noble gases
Period: The rows of the periodic table
Increasing atomic number
Same period, similar chemical properties
Families and Periods

13. How metal do you metal?
The periodic table can be divided into metals, non-metals and metalloids.

14. Metals Mostly the left side of the table (before the staircase)
Three categories: Alkali metals, Alkaline Earth Metals, Transition Metals (Left to Right)
Metals

15. Properties of Metals Solid Metallic Lustre Malleable, Ductile
Only liquid is Mercury (Hg)
Metallic Lustre
Malleable, Ductile
Conducts Electricity
Properties of Metals

16. Metal Families Alkali metals ALKALINE EARTH METALS Group 1 Elements
Shiny, Silvery , Soft
Highly Reactive
Li, Na, K…
Metal Families
ALKALINE EARTH METALS
We do not often encounter these on our own because they are highly reactive
Salt instead of just sodium
Calcium strong bones and teeth
Strontium is used In sea shells
Group 2 Elements
Not as soft
Less reactive, but burn bright colors in flames
Be, Mg, Ca…

17. Mostly the upper right side of the table (before the staircase)
Three categories: Noble Gases, Halogens, Other Non- Metals (Right to left)
Non- Metals

18. Properties of Non- Metals
Gases or powdery solids
Only liquid is Bromine (Br)
Brittle
Dull
Generally poor conductors
Properties of Non- Metals
-Carbon is an exception to conductors
-Take advantage of this to insulate houses in the winter
-Insert layer of argon gas to trap heat

19. Non-Metal Families halogens Noble gases Group 17 Elements F, Cl, Br..
Very reactive
Many are poisonous
Non-Metal Families
Noble gases
We do not often encounter these on our own because they are highly reactive
Chlorine gas in ww1 or in pools to kill bacteria
Iodine is used to clean cuts
Helium is used in ballons because low density
Often used in bright signs (arong blue, krypton pink, xenon purple, neon red)
Except for radon non toxic
Group 18 Elements
Unreactive
He, Ne, Ar…

20. Metalloids Fall along the “staircase”
Except Aluminum
Properties of metals and non-metals
Metalloids

21. IF YOU LOSE YOUR PERIODIC TABLE

22. Reactivity
Once I told a chemistry joke…
There was no reaction 

24. IF YOU LOSE YOUR PERIODIC TABLE

25. Alkali Metals

26. Colouring Sheet