Unit #1Unit #2Unit #3Unit #4Unit #5Unit #6Unit #7Unit #8Unit #9Unit #10
spacerUNIT # 3  

spacerof the Atom

spacerAtomic Number - Number of Protons
spacerNumber of Electrons
spacerMass Number - Number of Neutrons
spacer3.2 Isotopes
spacer3.3 Arrangement
spacerof Electrons

spacerThe Bohr Model
spacerBohr Diagram
spacerThe Lewis Electron-dot Symbol
spacerThe Quantum Mechanical Model of the Atom
spacerElectrons in the sublevels

spacer3.4 Electron

spacerFilling Order of the Sublevels

spacerElectron Configuration Notations
spacerElectron Configuration for Atoms of the First 20 Elements
spacerElectron Configuration and the Periodic Table
spacer3.5 Atomic Mass
spacerCalculation of Atomic Mass
spacerCalculate the Atomic Mass of Carbon

spacer1 | 2 | 3



On completion of the unit you should be able to:

  1. state the mass, charge and location of protons, electrons and neutrons.
  2. given the atomic number of an element, draw diagrams showing the protons in the nucleus and the electrons in shells (or energy levels) around the nucleus.
  3. write the electron dot formulae for the elements in groups 1 to 8 in the periodic table.
  4. define valence electrons and atomic number.
  5. define positive and negative ions.
  6. identify the elements in the periodic which tend to form positive ions and those which tend to form negative ions.
  7. define isotopes, mass number and atomic mass.
  8. given the relative abundance and isotopic masses for an element, calculate the atomic mass of that element.
  9. given the atomic number and mass number of an element, calculate the number of electrons.





All contents copyrighted © 1996-2006
British Columbia Institute of Technology
Chemistry Department - 3700 Willingdon Avenue
Burnaby, B.C. Canada V5G 3H2