2.3 Elements can combine form compounds

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see.jerald
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77975
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2.3 Elements can combine form compounds
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2011-04-06 23:38:49
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Elements can combine form compounds
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Elements can combine to form compounds
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  1. What is a compound?
    a substance consisting of two or more different elements combined in a fixed ratio
  2. What are the 4 main elements in compounds?
    carbon, hydrogen, oxygen, nitrogen
  3. What is an an atom?
    The smallest unit of matter that still retains properties of an element
  4. What is a proton?
    a particle with one positive electrical charge
  5. what is an electron?
    a subatomic particle with a single negative electrical charge
  6. What is a neutron?
    an electrically neautral atom
  7. What is a nucleus?
    an atom's central core
  8. How do the electrons stay near the nucleus?
    the attraction between between the - charged electrons and the + charged protons
  9. What is the atomic number?
    atoms of a particular element have the same unique number of protons
  10. What is an atom's mass number?
    the sum of the protons and neutrons in the nucleas
  11. What is atomic mass?
    equal to it's mass number, the sum of protons and neautrons
  12. What are isotopes?
    have the same numbers of protons and electrons and behave identically, but they have different numbers of neautrons
  13. what is a radioactive isotope?
    When the nucleus decays spontaneously giving off particles and energy.

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