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

Unit # 3 - Atomic Structure
Number of protons, neutrons, electrons and mass numbers
  1. For 35Cl, determine the
    • mass number:
    • number of protons:
    • number of electrons:
  2. For 44Ca2+, determine the
    • number of protons:
    • number of neutrons:
    • number of electrons:
  3. For 81Br -, determine the
    • number of neutrons:
    • number of electrons:
    • number of protons:
  4. For 206Pb, determine the
    • number of electrons:
    • number of neutrons:
    • mass number:

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