Chapter 5 glossary terms

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  1. Atom
    The smallest particle that makes up all matter
  2. Electron
    a negatively charged sub-atomic particle
  3. Sub-atomic Particle
    part of an atom
  4. Nucleus
    The centre of an atom containing protons and neutrons
  5. Protons
    a positively charged sub atomic particle
  6. neutron
    a sub atomic particle with a neutral charge
  7. Energy levels
    the areas around the nucleus containing electrons, drawn as rings
  8. Atomic number
    The number of electrons and protons in an atom
  9. Mass number
    The weighted average of protons and neutrons combined
  10. isotope
    an atom with a different number of neutrons than protons
  11. bohr-ruthorford diagram
    a model of the atom showing the energy levels as rings containing electrons, and protons and neutrons in the nucleus
  12. Atomic mass
    the total mass of electrons, protons and neutrons in an atom
  13. Periodic table
    A chart containing all the known elements and divides them into groups with similar characteristics
  14. Metal
    An element that seeks to lose electrons, found on the left side of the periodic table
  15. Non-metal
    an element that seeks to gain electrons, found on the right side of the periodic table
  16. Metaloid
    a substance that shares properties with both metals and non-metals
  17. Period
    A horizontal row on the periodic table
  18. Group
    a vertical column on the periodic table
  19. Alkali metal
    elements found in group 1 of the periodic table
  20. Alkaline earth metals
    elements found in group 2 of the periodic table
  21. Halogens
    elements found in group 17 of the periodic table
  22. Noble gasses
    very stable elements found in group 18 of the periodic table. All energy levels are full to capacity.
  23. Valence electrons
    Electrons left in the outermost energy level that is not full.
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Chapter 5 glossary terms
2014-05-20 20:37:57
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