1. Element: A substance containing just one kind of atom eg Mg, Fe, H2
H2 gas
Ar gas
Compound: is made up of two or more different elements, chemically bonded together. Has different properties to the elements that made them up.
eg CO2, H2O, H2SO4, C2H5OH
CO2 gas
Molecule: A pair or group of atoms bonded together
eg H2, CO2

2. Mixtures
consists of two or more different elements and/or compounds physically intermingled,
can be separated into its components by physical means
Eg Ar gas
H2 gas
CO2 gas

3. Element, Compound, or Mixture?
Rocks

4. Element, Compound, or Mixture?
Rocks

5. Element, Compound, or Mixture?
Copper

6. Element, Compound, or Mixture?
Copper Cu

7. Element, Compound, or Mixture?
Jelly Beans

8. Element, Compound, or Mixture?
Jelly Beans

9. Element, Compound, or Mixture?
Table Sugar

10. Element, Compound, or Mixture?
Table Sugar
C12H22O11

11. Element, Compound, or Mixture?
Diamond

12. Element, Compound, or Mixture?
Diamond C

13. Element, Compound, or Mixture?
Tea

15. Elements combine in fixed amounts.
Use a chemical formula to describe elements eg
FORMULA and NAME
# of ATOMS in the molecule
H2O
Water
H2O is really H2O1 2 H + 1 O = 3 atoms
CH4 Methane
CH4 is really C1H4 4 H + 1 C = 5 atoms
C12H22O11 sugar
12C + 22H + 11O = 45 atoms

16. C12H22O11 sugar

17. Task 1
Here are two different atoms:
Use them to draw a:
Compound
Mixture

18. Difference between Mixtures and Compounds
When iron filings and sulphur are mixed in a watch glass, you can still see the black specks of iron and the yellow sulphur powder.
Compound
When a mixture of iron and sulphur is heated, a black  shiny compound, iron [II] sulphide (FeS) is formed.

19. Difference between Mixtures and Compounds
When a magnet is brought near this mixture of two elements, the iron filings are pulled away and stick to the magnet. Sulphur remains in the watch glass.
Compound
When the magnet is brought near it, the iron of the iron [II] sulphide remains unaffected.

20. Iron and Sulphur Practical
A mixture occurs when you combine matter in a way where the components can be separated again. A compound results from a chemical reaction between components, forming a new substance. For example, you can combine iron filings with sulphur to form a mixture. All it takes is a magnet to separate the iron from the sulphur. On the other hand, if you heat the iron and sulfur, you form iron sulphide, which is a compound.

21. Aim: Investigate the properties of a mixture compared to a compound
First form a mixture. Stir some iron filings and sulfur together to form a powder. You have just taken two elements and combined them to form a mixture. You can separate the components of the mixture by stirring the powder with a magnet.
Method:
Place 7g iron filings and 4 g sulphur powder in a crucible.
Mix thoroughly
Heat the mixture
Cool
Observe the colour and take a magnet near it to see if any particle is attracted to it.
Results / Observations:
Conclusions: