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Phases and Changes

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Phases and Changes Matter Substance Element one type of atom Compound ionicly bonded atoms Molecule covalently bonded atoms Mixture Homogenous uniform solutions ... – PowerPoint PPT presentation

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Title: Phases and Changes


1
Phases and Changes
2
Matter
  • Substance

Mixture
Element one type of atom
Homogenous uniform solutions
Heterogeneous separate pieces can be observed
Compound ionicly bonded atoms
Molecule covalently bonded atoms
3
Phases
  • There are three main phases
  • Solid
  • Liquid
  • Gas

4
Solid Phase
  • Least amount of energy
  • Atoms are vibrating in place
  • Constant volume
  • Constant shape

5
Liquid Phase
  • Atoms are sliding across one another
  • Constant volume
  • No constant shape

6
Gas Phase
  • Most energy is present
  • No constant volume
  • No constant shape

7
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8
Changes in Phase
9
Physical Property
  • Observations that can be made without changing
    any of the atoms in a substance

10
Physical Change
  • When matter changes in an observable way, but
    its chemical structure does not change
  • Ex. A solid becoming a liquid, mixtures

11
Chemical Property
  • The bonding and chemical structure of a substance

12
Chemical Change
  • When the actual atoms, molecules, or compounds
    are changed
  • Ex. Chlorine and Sodium form an ionic bond,
    substances

13
Law of Conservation of Matter
  • In physical and chemical changes, no matter is
    created or destroyed
  • You will always have the same number of protons,
    electrons, and neutrons at the beginning of a
    change and at the end of the change
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