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Atomic structure student version

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Atomic structure by Mr Law Hock Ling

Atomic structure by Mr Law Hock Ling

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Transcript

  • 1. Edufest 2013
  • 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. Atomic Structure
  • 4. It Boils Down To Atoms!
  • 5. Subatomic Particles care
  • 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. Bohr Model of an Atom
  • 8. Electron arrangement in an Atom
  • 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. Electronic Structure of a Magnesium atom
  • 11. Representing the Proton and Mass Numbers Neutral Atom : No of protons = No of electrons
  • 12. Skills Practice 1
  • 13. Drawing Electronic Structures Could you spot some patterns?
  • 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. Skills Practice 2
  • 16. T/F
  • 17. Skills Practice 3