Chemistry Chapter 4

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laurenschmalz
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Chemistry Chapter 4
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2013-11-19 21:02:08
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  1. Matter
    • Anything that has mass and occupies space.
    • E.g. A pencil, oxygen and water are matter.
  2. Pure Substance
    • Matter that contains only one type of particle.
    • E.g. Water
  3. Mixture
    • Matter that contains more than one type of particle.
    • E.g. Salt water (Salt dissolved in water)
  4. Element
    • A pure substance that cannot be broken down into simpler parts by chemical methods.
    • E.g. Helium
  5. Compound
    • A pure substance made of two or more different elements that are chemically combined.
    • E.g. Water is made of hydrogen and oxyegen
  6. Physical Property
    • A characteristic of a substance that can be observed and measured without changing the identity of the substance.
    • E.g. Colour - colourless, red, black
    • Odour - Sweet, pungent, mouldy.
  7. Viscosity
    • The measure of a substance's resistance to flow.
    • E.g. The more viscous a fluid is, the slower it flows.
  8. Melting Point
    The temperature at which a solid turns into a liquid.
  9. Boiling Point
    • The temperature at which a liquid turns into a gas.
    • E.g. The boiling point for water is 100C
  10. Solubility
    • A measure of the ability of a substance to dissolve in another substance.
    • E.g. Salt dissolves easily into water.
  11. Density
    The ratio of the mass of a substance to the volume it occupies.
  12. Chemical Property
    The ability of a substance to change (react) and form new substances.
  13. Combustibility
    The ability of a substance to burn in air.
  14. Stability
    The ability of a substance to remain uncharged.
  15. Toxicity
    The ability of a substance to cause harmful effects in plants and animals.

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