1. Classifying Matter: Elements, Compounds, and Mixtures

2. Pre-assessment 1. An element is made up of A. one kind of atom
B. two kinds of atoms
C. one kind of compound
D. two kinds of compounds

3. 2. Heat moves in a predictable flow
A. from light objects to heavy objects
B. from heavy objects to light objects
C. from warmer objects to cooler objects
D. from cooler objects to warmer objects

4. 3. Which unit can be used to express the density of a substance.
A. g/cm2
B. cm3
C. kg
D. kg/m3

5. 4. The mass of an object can be measured using a
A. meter stick
B. balance
C. graduated cylinder
D. thermometer

6. Objectives: By the end of the period you should know:
1. what kind of properties are used to describe matter
2. what are elements and how do they relate to compounds
3. what are the properties of a mixture?

7. What is matter?
Matter is anything that has mass and takes up space.

8. Properties of matter
Chemistry is the study of the properties of matter and how matter changes
Some matter are substances = a single kind of matter that is pure.
Table salt, sugar, water, baking soda
None-pure substances= Flower, milk, eggs, fruit, salt water
**Every form of matter has two kinds of properties, physical and chemical.

9. Physical Properties
A physical property is a characteristic of a pure substance that can be observed without changing it into another substance.
EX: density, temperature, color, state of matter, conductivity, boiling point, freezing point, melting point, etc.

10. Chemical Properties
A Chemical property is a characteristic of a pure substance that describes its ability to change into another substance.
You must try to change a substance into another substance to observe chemical changes
EX: flammability, oxidation, reactivity

11. Atoms Elements Compounds Molecules
Pure Substances
A sample of matter that has definite chemical and physical properties.
Atoms
Elements
Compounds
Molecules

12. Elements
pure substance that cannot be separated into simpler substance by physical or chemical means.
The simplest substances

13. Particles of Elements- Atoms
Atom= The basic particle from which all elements are made.
Atoms of most elements have the ability to combine.
Chemical bonds- when atoms combine because of a force of attraction between them
When atoms combine they form molecules= a group of 2 or more atoms held together by chemical bonds.

14. Compounds
Pure substance composed of two or more different elements joined by chemical bonds.
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

15. Mixtures
A combination of two or more pure substances that are not chemically combined.
substances held together by physical forces, not chemical
No chemical change takes place
Each item retains its properties
in the mixture
They can be separated physically
Chem4kids.com

16. Mixtures
There are two types of mixtures, homogeneous and heterogeneous.
Homogeneous are the same throughout. A solution is an example of a homogeneous mixture
Heterogeneous mixtures have different parts.

17. Mixtures vs. Compounds

18. 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.

19. Element, Compound, or Mixture?
Rocks

20. Element, Compound, or Mixture?
Rocks

21. Element, Compound, or Mixture?
Copper

22. Element, Compound, or Mixture?
Copper Cu

23. Element, Compound, or Mixture?
Jelly Beans

24. Element, Compound, or Mixture?
Jelly Beans

25. Element, Compound, or Mixture?
Table Sugar

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

27. Element, Compound, or Mixture?
Diamond

28. Element, Compound, or Mixture?
Diamond C

29. Element, Compound, or Mixture?
Tea

30. Element, Compound, or Mixture?
Tea

31. Element, Compound, or Mixture?
Salt

32. Element, Compound, or Mixture?
NaCl
Salt

33. Element, Compound, or Mixture?
Neon Gas

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

35. Element, Compound, or Mixture?
Salad

36. Element, Compound, or Mixture?
Salad

37. Element, Compound, or Mixture?
Pure Water

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

39. Element, Compound, or Mixture?
Aluminum

40. Element, Compound, or Mixture?
Aluminum Al

41. Element, Compound, or Mixture?
Lemonade

42. Element, Compound, or Mixture?
Lemonade

43. Element, Compound, or Mixture?
Silver

44. Element, Compound, or Mixture?
Silver Ag

45. Element, Compound, or Mixture?
Sand

46. Element, Compound, or Mixture?
Sand

48. Notes Detailed notes are located at:
mixtures-notes-isn.pdf
Flow Chart:
isn.pdf