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Elements, Compounds, and Mixtures

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Element, Compound, or Mixture? Pure Water Element, Compound, or Mixture? Aluminum Element, Compound, or Mixture? Aluminum Element, Compound, or Mixture? – PowerPoint PPT presentation

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Title: Elements, Compounds, and Mixtures


1
Elements, Compounds, and Mixtures
2
Pure Substances
  • A sample of matter that has definite chemical and
    physical properties.

Elements
Atoms
Compounds
Molecules
3
What is an ELEMENT?
H2
C
  • A pure substance containing only one kind of
    atom.
  • Cannot be separated into simpler materials by
    chemical or physical means.
  • Over 100 existing elements are listed and
    classified on the Periodic Table

Cl
Na
O2
4
What is a COMPOUND?
  • A pure substance containing two or more kinds of
    different elements
  • The atoms are chemically combined in some way

H2O
  • Compounds cannot be separated by physical means,
    separating a compound requires a chemical
    reaction
  • Properties of a compound are usually different
    than the properties of the elements it contains

NaCl
CO2
5
What is a MIXTURE?
  • Two or more elements or compounds NOT chemically
    combined
  • Can be uniform called homogeneous and are known
    as solutions
  • Can also be non-uniform called heterogeneous
  • Can be separated into their components by
    chemical or physical means

6
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7
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8
Element, Compound or Mixture?
Mixture
9
Element, Compound or Mixture?
Compound
10
Element, Compound or Mixture?
Mixture
11
Element, Compound or Mixture?
Element
12
Element, Compound or Mixture?
Mixture
13
Element, Compound or Mixture?
Element
14
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

15
Element, Compound, or Mixture?
  • Rocks

16
Element, Compound, or Mixture?
  • Rocks

17
Element, Compound, or Mixture?
  • Copper

18
Element, Compound, or Mixture?
  • Copper

Cu
19
Element, Compound, or Mixture?
  • Jelly Beans

20
Element, Compound, or Mixture?
  • Jelly Beans

21
Element, Compound, or Mixture?
  • Table Sugar

22
Element, Compound, or Mixture?
  • Table Sugar

C12H22O11
23
Element, Compound, or Mixture?
  • Diamond

24
Element, Compound, or Mixture?
  • Diamond

C
25
Element, Compound, or Mixture?
  • Tea

26
Element, Compound, or Mixture?
  • Tea

27
Element, Compound, or Mixture?
  • Salt

28
Element, Compound, or Mixture?
NaCl
  • Salt

29
Element, Compound, or Mixture?
  • Neon Gas

30
Element, Compound, or Mixture?
Ne
  • Neon Gas

31
Element, Compound, or Mixture?
  • Salad

32
Element, Compound, or Mixture?
  • Salad

33
Element, Compound, or Mixture?
  • Pure Water

34
Element, Compound, or Mixture?
  • Pure Water

H2O
35
Element, Compound, or Mixture?
  • Aluminum

36
Element, Compound, or Mixture?
  • Aluminum

Al
37
Element, Compound, or Mixture?
  • Lemonade

38
Element, Compound, or Mixture?
  • Lemonade

39
Element, Compound, or Mixture?
  • Silver

40
Element, Compound, or Mixture?
  • Silver

Ag
41
Element, Compound, or Mixture?
  • Sand

42
Element, Compound, or Mixture?
  • Sand

43
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