chemistry 1

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chemistry 1
2012-12-11 17:33:19

chapter 4
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  1. Matter
    • Anything that has mass and occupies space
    • i.e. wood, air, water
  2. Pure substance
    • Matter that contains only one kind of particle
    • ex; sulfur
  3. Mixture
    Matter that contains more than one kind of particle
  4. Element
    • A pure substance that cannot be broken down into simpler parts by chemical methods
    • ex; hydrogen,helium, lithium, berillium
  5. Compound
    • A pure substance made of two or more different elements that are chemically combined
    • ex; water, table salt(sodium chloride), carbon dioxide
  6. Physical property
    A characteristic of a substane that can be observed and measured without changing the identity of the substance
  7. Viscosity
    The measure of a substance's resistance to flow
  8. Melting point
    The temperature at which a solid turns into a liquid
  9. Boiling point
    • The tempertaure at which a liquid turns into a gas
    • ex; Water's boiling point is 100 degrees celcius
  10. Solubility
    A measure of the ability of a substance to dissolve in another substance
  11. Density
    The ratio of the mass of a substance to the volume it occupies
  12. Chemical property
    The ability of a subtance to change or react, and to form a new substance
  13. Combustibility
    The ability of a substance to burn in air
  14. Stability
    The ability of a substance to remain unchanged
  15. Toxicity
    The ability of a substance to cause harmful effects in plants and animals