Atomic structure student version

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Atomic structure by Mr Law Hock Ling

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Atomic structure student version

  1. 1. Edufest 2013
  2. 2. Sec 3 Chemistry Timeline Topic Date Kinetic Particle Theory Jan Experimental Techniques Jan-Feb Elements, Compounds and Mixtures Feb Atomic Structure Feb-Mar Chemical Bonding Mar-Apr Chemical Equations Apr Acids, Bases and Salts Apr-May Chemical Calculations Jun-Jul The Atmosphere and Environment Jul-Aug Revision Sep-Oct
  3. 3. Atomic Structure
  4. 4. It Boils Down To Atoms!
  5. 5. Subatomic Particles care
  6. 6. The Model of an Atom •One negative charge (1-) •Negligible mass (1/1836) •No electric charge •Relative mass of 1 •One positive charge (1+) •Relative mass of 1
  7. 7. Bohr Model of an Atom
  8. 8. Electron arrangement in an Atom
  9. 9. Rules for Drawing Electronic Structures • An electron occupies the ___________before pairing up with another. • __________energy shells are occupied first. • First shell, max = ___ electrons • Second shell, max = ___ electrons • Third shell, max = ___ electrons • Fourth shell, max = ___ electrons
  10. 10. Electronic Structure of a Magnesium atom
  11. 11. Representing the Proton and Mass Numbers Neutral Atom : No of protons = No of electrons
  12. 12. Skills Practice 1
  13. 13. Drawing Electronic Structures Could you spot some patterns?
  14. 14. What is the relationship between these three atoms? ISOTOPES! ATOMS OF THE SAME ELEMENT WITH THE SAME NUMBER OF PROTONS AND ELECTRONS, BUT DIFFERENT NUMBER OF NEUTRONS.
  15. 15. Skills Practice 2
  16. 16. T/F
  17. 17. Skills Practice 3

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