1. Looking Back at Grade 9 Chemistry

2. Agenda
Atomic Theory
Periodic Table
Counting Atoms
Classifying Matter

3. Copper has... 29 protons, 29 electrons and 29 neutrons

4. Model of the Atom

5. Orbit around the nucleus
Subatomic Particles
Protons
Neutrons
Electron
Electric Charge
Positive +
Neutral
No Charge
Negative -
Location
Inside nucleus
Inside the nucleus
Orbit around the nucleus

6. Atomic number number of protons in an atom
number of electrons in a neutral atom
periodic table is organized by atomic number

7. How many Neutrons in each?
Atomic Mass
Sum of Protons and Neutrons
Mass # - Atomic # = # of Neutrons
= 35 neutrons
How many Neutrons in each?

8. Standard Atomic Notation

9. Bohr Rutherford Diagrams
How many electrons are in the valence (outermost) shell?
Oxygen has 6 electrons in it’s valence shell.
To have a full valence shell oxygen will need two more electrons
Oxygen now has a charge of 2-
this in an example of an ion
What about Na, F and Ne?

11. You may colour your periodic table to help you.
Period: a horizontal line in the table
Family/Group: a vertical line in the table 1 18
1. Alkali Metals 2 17
2. Alkaline Earth Metals
17. Halogens
18. Noble Gases
You may colour your periodic table to help you.

13. Periodic Table Scavenger Hunt
For the next minutes you will be working on a worksheet to familiarize yourself with the periodic table.
It is important that you understand the periodic table as it will greatly help you to predict how elements will react together for future labs in class.

14. Counting Atoms
How many atoms of each element are in the following compound: 2 Ni3(PO4)2
N = 6 atoms, P = 1 atom, O = 8 atoms
N = 6 atoms, P = 2 atoms, O = 16 atoms
N = 3 atoms, P = 2 atoms, O = 8 atoms
N = 6 atoms, P = 4 atoms, O = 16 atoms

15. Counting Atoms
When determining how many atoms of each element are in a molecule we look at subscripts and coefficients
Subscripts: H2 = 2 atoms of Hydrogen
Mg3(PO4)2 =
3 atoms of Mg
3 atoms of P
8 atoms of O

16. Counting Atoms Coefficients: Affect all elements in the compound
2H2O = 4 atoms of H
2 atoms of O

17. Classifying Matter
Complete a concept map about matter. Then attempt this chart.
Substances
Pure Substance or Mixture
Element, Compound, Mechanical Mixture or Solution
Gold
Sun Tan Lotion
HCl
Paper in water
Pure Substance
Element
Mixture
Solution
Pure Substance
Compound
Mixture
Mechanical Mixture