Chemistry Chapter 4

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Chemistry Chapter 4
2012-11-11 14:22:25
Chemistry Chapter

Chemistry Chapter 4
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  1. What is matter?
    Anything that has mass and occupies space
  2. what is a pure substance?
    • matter that contains only one type of particle
    • made into elements and compounds
  3. what is a mixture?
    matter that contains more than one type of particle
  4. what is an element?
    a pure substance that cannot be broken down into simpler parts  by chemical methods
  5. what is a compound?
    a pure substance that is made up of two or more different elements that are chemically combined
  6. what is a physical property?
    a characteristic of a substance that can be observed and measured without changing the identity of the substance 
  7. what is viscosity?
    the measure of a substances resistance to flow
  8. what is melting point?
    the temperature at which a solid turns into a liquid
  9. what is boiling point?
    the temperature at which a liquid turns into a gas
  10. what is solubility?
    a meausre of the ability of a substance to dissolve into another substance
  11. what is density?
    the ratio of the mass of an object to the space it occupies
  12. what is chemical property?
    the ability of a substance to change (react)and form new substances
  13. what is combustibility?
    the abilitiy of a substance to burn in air
  14. what is stability?
    the ability of a substance to remain unchanged
  15. what is toxidity?
    the ability of a substance to cause harmful effects in plants and animals