1. Elements, Compounds & Mixtures
Chapter 22 Page 129

2. What is all matter made of?
An atom is the smallest part of an element that still has the properties of that element

3. Elements
An element is a substance which cannot be broken down into simpler substances by chemical means

4. It is made up of only one kind of atom
Element
It is made up of only one kind of atom

5. Compounds
A compound is a formed when two or more elements combine together chemically

6. Hydrogen (H) + Oxygen (O)
Examples of Compounds
Compounds contain elements
The elements combine + lose their original properties
Compounds CAN be separated by chemical means
The elements combine in fixed ratios
A compound is a completely new substance
with its own properties
Sodium (Na) +
Chlorine (Cl)
NaCl
Hydrogen (H) + Oxygen (O)
H2O
Carbon (C) + Oxygen (O)
CO2

7. Mixtures
A mixture consists of two or more different substances mingled together but not chemically combined

8. Examples of Mixtures Properties of Mixtures:
chicken noodle soup
salad
pizza – yes, that would be Yoda…
Properties of Mixtures:
Each substance in a mixture keeps its identity
You can physically separate them
They also contain elements, compounds, or both
And they can be formed using any ratio of
components

9. Differences between Mixtures and Compounds
Consist of a single substance
The elements in a compound is always in a fixed proportion
The properties are very different to those of the elements used
Very difficult to separate
Consist of two or more substances
The proportion of each substance in the mixture does not matter
The properties are the same as those of the substances used
Usually easy to seperate

10. Identify the following with as many terms as apply
Table salt
Salad
Mayonnaise
Italian dressing
Pepsi
Oxygen
Hydrogen
Water
Mixture
Element
Compound

11. Solutions
Chapter 23 – Page 136