Science - The Atom

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Author:
aoifeparker
ID:
179044
Filename:
Science - The Atom
Updated:
2012-10-22 15:04:10
Tags:
chemistry 3rd year
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Description:
Ch21 pg178-pg183
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  1. What is an atom?
    The smallest part of an element which still has the properties of that element.
  2. What is the name given to the smaller particles in which atoms are made up of?
    Sub-atomic particles.
  3. What are the names of the three sub-atomic particles in an atom?
    • Protons
    • Neutrons
    • Electrons
  4. What is the mass of a proton?
    1 unit
  5. What is the charge of a proton?
    Positive charge (+1)
  6. Where is the location of a proton?
    In the nucleus.
  7. What is the mass of a neutron?
    1 unit.
  8. What is the charge of a neutron?
    None
  9. Where is the location of a neutron?
    In the nucleus.
  10. What is the mass of an electron?
    Negligible.
  11. What is the charge of an electron?
    Negative charge (-1)
  12. Where is the location of an electron?
    Orbiting the nucleus.
  13. What is the atomic number of an element?
    The number of protons in an atom of that element.
  14. What is the mass number of an element?
    The total number of protons and neutrons in an atom of that element.

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