1. Element, Compound, Mixture
review

2. 3 classes of matter
Elements
Compounds
Mixtures

3. 3 classes of matter Elements made of one type of atom pure Compounds
made of two or more different types of atoms
CHEMICALLY combined/bonded together
Can be separated by CHEMICAL REACTIONS
Mixtures
physical combinations of different substances
can be separated by exploiting the different physical properties of different components of the mixture.

4. Identify the element, compound & mixture

5. Identify the element, compound & mixture
H2O
salad
C6H12O6 Fe
Salt Water
Alloys

6. Identify the element, compound & mixture
H2O compound
salad mixture
C6H12O6 compound
H2 element
Salt Water mixture
Alloys mixture

7. Types of Mixtures
Homogeneous Heterogeneous Sort the descriptions looks like one substance can identify different components solution air brass soil

8. Types of Mixtures Homogeneous Heterogeneous
looks like one substance can identify different components
solution soil
air
brass

9. What type of mixture is this?

10. Coffee is a(n)
Element Compound Mixture Homogeneous mixture Heterogeneous mixture Solution

11. Coffee is a(n)
Element Compound Mixture Homogeneous mixture Heterogeneous mixture Solution

12. Sulfuric Acid (H2SO4) is a(n)
Element Compound Mixture Homogeneous mixture Heterogeneous mixture Solution

13. Sulfuric Acid (H2SO4) is a(n)
Element Compound Mixture Homogeneous mixture Heterogeneous mixture Solution

14. Iron (Fe) is a(n)
Element Compound Mixture Homogeneous mixture Heterogeneous mixture Solution

15. Iron (Fe) is a(n)
Element Compound Mixture Homogeneous mixture Heterogeneous mixture Solution

16. The best example of a solution is:
Baking Soda (NaHCO3)
Coca cola
Chex mix
Iron filings (Fe)

17. The best example of a solution is:
Baking Soda (NaHCO3)
Coca cola
Chex mix
Iron filings (Fe)

18. How to read a formula 2H2O 2NaOH 8H2 4Ag O2 8H2SO4
What are the subscripts for each
of the following formulas?
What if an element doesn’t have
a subscript?
What information does the
subscript tell you?

19. How to read a formula 2H2O 2NaOH 8H2 4Ag O2 8H2SO4
What are the subscripts for each
of the following formulas?
What if an element doesn’t have
a subscript? We assume it’s a “1”
2H2O1
2Na1O1H1
What information does the
subscript tell you? The number of
atoms of each element in a
molecule.

20. Before balancing an equation, you need to know how to read a formula
2NaOH
8H2
4Ag
O2 
8H2SO4
What are the coefficients for each
of the following formulas?
What if a reactant doesn’t have
a coefficient?
What information does the
coefficient tell you?

21. Before balancing an equation, you need to know how to read a formula
2NaOH
8H2
4Ag
O2 
8H2SO4
What are the coefficients for each
of the following formulas?
What if a reactant doesn’t have
a coefficient? Then we assume it is
a “1”
e) 1O2 
What information does the
coefficient tell you? How many
molecules of a reactant are present
in a reaction

22. What is a pure substance?

23. What is a pure substance?
Pure substances are made of only one type of substance. Elements and compounds are pure substances. Every particle of an element or a compound is identical…..PURE!
Mixtures are not pure, they are physical combinations of different elements and compounds.

24. How do you break down an…
Element?
Compound?
Mixture?

25. How do you break down an…
Element?
you can’t break an element into simpler parts using natural processes.
Compound?
compounds are broken into simpler parts through chemical reactions
H2O  H2 + O2
Mixture?
because they are physically combined, you can use the physical properties of different components to separate the parts of a mixture.

26. Processes used to separate mixtures:
sifting – uses differences in size to separate components
filtering – uses very small pores in the filter to separate components. Frequently used in conjunction with solubility
distillation – evaporation and condensation of different parts of a mixture. Differences in boiling points are exploited.
Physical properties used:
magnetism – to separate iron filings
solubility
melting & boiling points