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

spacer3.1
Structure
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
spacerConfigura
tions

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

spacerspacerProblems
spacer1 | 2 | 3
   

Unit # 3 - Atomic Structure
Names and symbols of elements and ions
  1. Write the symbol for each atoms or ion. For example, 3 protons, 2 electrons = Li+

    • 25 protons, 30 neutrons, 25 electrons
    • 94 protons, 150 neutrons, 94 electrons
    • 13 protons, 14 neutrons, 10 electrons
  2. Give the name and symbol of the element represented by X for each of the following isotopes:
    188
    X
    76

  3. 34
    X2-
    16

  4. 85
    X+
    37
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