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  • 1. Physical Science
    Chemical Properties
  • 2. Atoms and Molecules
    An Atom is made up of protons, electrons, and neutrons.
    An Element is a unique number of protons.
    When 2 or more atoms combine together chemically, it is called a molecule.
  • 3. Molecular Elements
    These are allotropes of carbon
  • 4. Compounds
    2 or more elements combined in a molecule
  • 5. What is a Chemical Reaction?
    It is the rearrangement of atoms to form new molecules.
    CH4 + 2O2 CO2 + 2H2O
  • 6. What is a Chemical Reaction?
    It is the rearrangement of atoms to form new molecules.
    CH4 + 2O2 CO2 + 2H2O
  • 7. What is a Chemical Reaction?
    It is the rearrangement of atoms to form new molecules.
    CH4 + 2O2 CO2 + 2H2O
  • 8. What is a Chemical Reaction?
    Some chemical reactions are exothermic
    They release energy as heat, light, or other forms.
  • 9. What is a Chemical Reaction?
    Some chemical reactions are endothermic
    They absorb energy from the environment to proceed.
  • 10. Chemical Properties
    Chemical properties can only be observed when the substances in a sample of matter are ________________.
    _____ and _____ are examples of chemical properties
  • 11. Chemical Properties
    Chemical properties can only be observed when the substances in a sample of matter are ________________.
    Changing into different substances
    _____ and _____ are examples of chemical properties
  • 12. Chemical Properties
    Chemical properties can only be observed when the substances in a sample of matter are ________________.
    Changing into different substances
    _____ and _____ are examples of chemical properties
    Flammability
    Reactivity
  • 13. Triggers to Chemical Reactions
    Most reactions do not occur spontaneously.
    Most require some trigger to get started.
    This could be a spark or even a touch.
    Let’s watch a fun video of a chemical reaction that is sensitive to the touch!
  • 14. Nitrogen Triiodide
    2 NI3 (s) -> N2 (g) + 3 I2 (g),
  • 15. Nitrogen Triiodide Decomposition
  • 16. Some Fun Experiments
    Mr. Taylor Does Nitrogen Triiodide
    http://www.youtube.com/watch?v=hERVtZEZrFQ
  • 17. Some Fun Experiments
    THERMITE!
    http://www.youtube.com/watch?v=sjLgzgflCk8
  • 18. Some Fun Experiments
    Pure Metallic Sodium in Water!
    http://www.youtube.com/watch?v=gFnNXkcoDSs
  • 19. Recognizing Chemical Change
    Chemical changes are taking place if you see a _____, ______, or ______.
    Change in color
    Production of a gas
    Formation of a precipitate
    **If you are watching by recording, send me the sentence above with the answers**
  • 20. Mixtures
    Iron and Sulfur powder in a the mixture
    So, it is hypothesis time:
    How can we separate the iron from the sulfur?
    Enter some ideas in the chat box.
  • 21. Mixtures
    Iron and sulphur – the mixture
    How can we separate the iron from the sulphur?
    Use a magnet!
    Iron is magnetic, sulfur is not...
  • 22. Turning an iron-sulphur mixture into a Compound
    Heat
    Fe + S FeS
  • 23. When iron and sulphur react
    +
    sulphur (S) atoms iron (Fe) atoms
  • 24. When iron and sulphur react
    +
    sulphur (S) atoms iron (Fe) atoms
    iron sulphide (FeS) molecules
  • 25. Differences between compounds and mixtures
    MIXTURES
    COMPOUNDS
    Mixtures can be separated easily
    Compounds can not be separated
  • 26. Differences between compounds and mixtures
    MIXTURES
    COMPOUNDS
    Mixtures can be separated easily
    Mixture have the properties of the substances present in it
    Compounds can not be separated
    Compounds do not have the properties of the elements
  • 27. Differences between compounds and mixtures
    MIXTURES
    COMPOUNDS
    Mixtures can be separated easily
    Mixture have the properties of the substances present in it
    No chemical change takes place when a mixture is made
    Compounds can not be separated
    Compounds do not have the properties of the elements
    A compound is always formed due to a chemical reaction
  • 28. Differences between compounds and mixtures
    MIXTURES
    COMPOUNDS
    Mixtures can be separated easily
    Mixture have the properties of the substances present in it
    No chemical change takes place when a mixture is made
    There is no heat taken in or given out when a mixture is made
    Compounds can not be separated
    Compounds do not have the properties of the elements
    A compound is always formed due to a chemical reaction
    Heat is either taken in or given out when a compound is made
  • 29. Differences between compounds and mixtures
    MIXTURES
    COMPOUNDS
    Mixtures can be separated easily
    Mixture have the properties of the substances present in it
    No chemical change takes place when a mixture is made
    There is no heat taken in or given out when a mixture is made
    A mixture can contain elements in any proportion
    Compounds can not be separated
    Compounds do not have the properties of the elements
    A compound is always formed due to a chemical reaction
    Heat is either taken in or given out when a compound is made
    A compound always contains the elements in fixed proportions, e.g. FeS contains 7g of iron to 4g of sulphur