1. Packet #3 Chapter #1 Sections 2 & 3
Matter
Packet #3
Chapter #1
Sections 2 & 3

2. Classifying Matter

3. Introduction Matter is all around All matter is composed of atoms
Water
Air
Plants
Friends
All matter is composed of atoms
In most cases, multiple atoms are joined together to make the matter.

4. Studying Matter
To study different types of matter, it must be classified.

5. Pure Substances
Pure substances have specific properties that can be used to identify it
Occurs in two forms
Elements
Compounds

6. Elements Pure substance that contains one type/kind of an atom.
May contain many of those atoms
The atom WILL have the same
Number of protons
Number of neutrons

7. Molecules
A molecule, which is a type of element, consists of two or more atoms in a defined ratio.
Molecules can exist in different forms
Two or more atoms
Elements
Multiple atoms (similar) joined together.

8. Compounds Substance that contains more than one kind of atom
Represented by formulas
Carbon Dioxide
CO2

9. Compounds
Chemical Formulas
Sunday, December 09, 2018

10. Introduction II Molecular Formulas Structural Formula
Says what the compound is made of and how many they are
Structural Formula
Shows how the molecule is orientated in space
12/9/2018 8:43:16 PM

11. Formulas in Chemistry II
Sunday, December 09, 2018

12. Substances & Mixtures

13. Substances & Mixtures Substances Mixtures
Pure substances can fall in two categories
Elements
One type
Cannot be separated by physical or chemical methods
Compounds
Two or more substances joined together
Can only be separated by chemical methods.
Physical blend of two or more substances
Heterogeneous Mixture
Not uniform throughout
2 or more phases
Homogeneous Mixture (Solution)
Uniform
Exists in 1 phase

14. Common Mixtures Solid~Solid Solid~Liquid Liquid~Liquid Sand & granite
Salad dressing
Liquid~Liquid
Oil & water

15. Common Solutions Gas-Gas CO2 in air Gas-Liquid CO2 in H2O (soda water)
Gas-Solid
Ice cream
Liquid-Gas
H2O vapor in air
Solid-Liquid
NaCl in H2O (salt water)
Solid-Solid
Cu in Ag (sterling silver)

16. Mixture & Substances Connection to Formulas

17. Mixtures & Formulas
Recall, a mixture is composed of two or more substances.
The formula shows the composition of the two or more mixtures.