1. Elements, Compounds & Mixtures

2. Topic: Purse Substances and Mixtures Essential Questions: How can you differentiate between elements and compounds? How can you differentiate between a homogeneous mixture (solution) and a heterogeneous mixture?

3. Elements and Compounds Study Jams Video

4. Matter is anything that has mass and takes up space (volume) There are different types of Matter: Pure Substances (elements and compounds) and Mixtures

5. Types of Pure Substances:
Elements And Compounds

6. Sample of the Element Lead Sample of the Element Chlorine
Elements
Made up of one type of atom
Cannot be broken down by physical and chemical methods
Examples: Oxygen, Nitrogen, Carbon
Sample of the Element Lead
Sample of the Element Chlorine

7. Compounds
A compound is a pure substance composed of 2 or more elements that are chemically combined.
Can be separated only by chemical methods
Examples: Water, Carbon dioxide, Sugar

8. Hydrogen (H) + Oxygen (O)
Examples of Compounds
Sodium (Na) +
Chlorine (Cl)
NaCl
Hydrogen (H) + Oxygen (O)
H2O
Carbon (C) + Oxygen (O)
CO2

9. Mixtures Study Jams Video

10. Mixtures
A mixture is a combination of 2 or more substances that are not chemically combined.
Can be separated by physical methods
They also contain elements, compounds, or both and they can be formed using any ratio of components.

11. Mixture of Different Elements Mixture of Different Compounds
Mixtures
Mixture of Different Elements
Mixture of Different Compounds

12. 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

13. Mixtures are often referred to as homogeneous or heterogeneous.

14. Mixtures may be homogeneous or heterogeneous
The prefix “homo” indicates the same
Homogeneous mixtures have the same appearance and properties throughout the mixture. Example: tea, perfume, air
The prefix “hetero” indicates difference
Heterogeneous mixtures consist of visibly different substances Ex: salad, oil and vinegar salad dressing

15. There are THREE types of mixtures:
Solutions
Suspensions
Colloids

16. Solutions
A solution is a mixture that appears to be a single substance, but it is actually composed of 2 or more substances that are distributed evenly amongst each other.
SOLUTIONS ARE HOMOGENEOUS
sugar & Kool-Aid powder are dissolved in water
carbon dioxide is
dissolved in water
salt is dissolved in water

17. Suspensions
A suspension is a mixture in which particles of a material are dispersed throughout a liquid or gas, but are large enough that they settle out.
SUSPENSIONS ARE HETEROGENEOUS
That water is disgusting!
muddy water
Italian dressing

18. Colloids
A colloid is a mixture in which the particles are dispersed throughout but are not heavy enough to settle out.
COLLOIDS ARE HOMOGENEOUS
Colloids have properties of both solutions & suspensions.
mayonnaise
milk