1. Elements, Compounds, and Mixtures

2. Pure Substance Pure substance: has only one type of component.
Example- water
Matter can be pure, or it can be two or more substances mixed together
Example- silver jewelry

3. Atoms Elements Compounds Molecules
Pure Substances
A substance is pure if it contains only a single type of atom or a single combinations of atoms that are bonded together
Atoms
Elements
Compounds
Molecules

4. Elements Substance that contains only a single type of atoms
Cannot separate into other substance

5. Compounds
Substance that consists of two or more different types of atoms bonded together
Example: water, salt, carbon dioxide
Made of elements in a specific ratio
that is always the same
Has a chemical formula
Can only be separated by
chemical means, not physically
H2O
NaCl
CO2

6. Mixtures
Combination of different substances that remain the same individual substances and can be separated by physical means
Example: mix of apple and oranges and bananas
Each item retains its
properties in the mixture
Does not always contain
the same amount of the
various substance
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7. Mixtures
Heterogeneous mixture: can see all the different parts of the mixture
Example: handful of soil that contains rocks, dirt, and insects
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8. Mixtures
Homogeneous mixture: substance is evenly spread throughout the mixture
Example: salt water
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9. Can you identify the following?
You will be shown a series of photos. Tell if each photo represents an item composed of an element, compound, or mixture.
Review:
An element contains just one type of atom.
A compound contains two or more different atoms joined together.
A mixture contains two or more different substances that are only physically joined together, not chemically.
A mixture can contain both elements and compounds.

10. Element, Compound, or Mixture?
Rocks

11. Element, Compound, or Mixture?
Heterogeneous
Rocks

12. Element, Compound, or Mixture?
Copper

13. Element, Compound, or Mixture?
Copper Cu

14. Element, Compound, or Mixture?
Jelly Beans

15. Element, Compound, or Mixture?
Heterogeneous
Jelly Beans

16. Element, Compound, or Mixture?
Table Sugar

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

18. Element, Compound, or Mixture?
Diamond

19. Element, Compound, or Mixture?
Diamond C

20. Element, Compound, or Mixture?
Tea

21. Element, Compound, or Mixture?
Homogeneous
Tea

22. Element, Compound, or Mixture?
Salt

23. Element, Compound, or Mixture?
NaCl
Salt

24. Element, Compound, or Mixture?
Neon Gas

25. Element, Compound, or Mixture?Ne
Neon Gas

26. Element, Compound, or Mixture?
Salad

27. Element, Compound, or Mixture?
Heterogeneous
Salad

28. Element, Compound, or Mixture?
Pure Water

29. Element, Compound, or Mixture?
Pure Water
H2O

30. Element, Compound, or Mixture?
Aluminum

31. Element, Compound, or Mixture?
Aluminum Al

32. Element, Compound, or Mixture?
Lemonade

33. Element, Compound, or Mixture?
Homogenous
Lemonade

34. Element, Compound, or Mixture?
Silver

35. Element, Compound, or Mixture?
Silver Ag

36. Element, Compound, or Mixture?
Sand

37. Element, Compound, or Mixture?
Heterogeneous
Sand

38. Heterogeneous

39. Practice (Element, Compound, Mixture)
Dirt
Nitrogen
Gold
water
Seven-bean soup
Sodium chloride
Sugar
Detergent
aluminum
Mixture
Element
Compound