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Why is learning about the atom important….? ,[object Object],[object Object],[object Object]
In Hiroshima, of a resident civilian population of 250 000 it was estimated that 45 000 died on the first day and a further 19 000 during the subsequent four months. In Nagasaki, out of a population of 174 000, 22 000 died on the first day and another 17 000 within four months. Over 90% of each city was destroyed.
Early Atomic Ideas ,[object Object],[object Object],[object Object]
Dalton’s Atomic Theory ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The Early 1800’s! ,[object Object],[object Object],[object Object]
But technology was limited until the late 1800’s, early 1900’s…. ,[object Object],[object Object],………… ..THE ELECTRON! Why do you think it was the first to be discovered……?
Cathode Ray Tube, or Crooke’s Tube ,[object Object],[object Object],[object Object],[object Object]
So what are Cathode Rays….? ,[object Object],[object Object],[object Object],[object Object],[object Object]
The cathode ray tube was the precursor to the modern day….. TELEVISION! Black and White….. Color…….
Millikan Oil-Drop Experiment ,[object Object],[object Object],[object Object],[object Object],[object Object]
Now that we have found negative particles…. ,[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object]
Who puts all of this information together into “The Big Picture”? ,[object Object],[object Object],[object Object]
Why was any of this monumental…? ,[object Object],[object Object],[object Object],[object Object]
So atoms are made of + and - particles.  How are some atoms “radioactive”?  What is “radioactivity”?  ,[object Object],[object Object],[object Object],[object Object],[object Object]
Ernest Rutherford was determined to figure out what this “radiation” was!  ,[object Object],[object Object],[object Object],[object Object],[object Object]
Rutherford’s Radiation Experiment
In Summary,  No mass, but speed of light! Can be dangerous! 0 0 Gamma   Fast, but no mass so little energy -1 0 Beta (  Slow and no energy +2 4 Alpha (  Speed and Energy charge Mass (amu) Type of radiation
[object Object],[object Object],[object Object],[object Object],Why do atoms give off radiation, then? ,[object Object],[object Object]
The Gold Foil Experiment…. What is happening?  Why are the alpha particles bouncing off?
Gold Foil Experiment Rutherford's Experiment
What is going on….? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Why did he think that ALL the protons were in the center? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Rutherford’s “nuclear” model!
What is the relative size of the atom….? ,[object Object],[object Object],[object Object],[object Object]
So why do some atoms give off radiation???? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
……..The neutron does! ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Problems after element 82….. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
In summary….. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Atomic Experiments Regular Fall07

  • 1.
  • 2. In Hiroshima, of a resident civilian population of 250 000 it was estimated that 45 000 died on the first day and a further 19 000 during the subsequent four months. In Nagasaki, out of a population of 174 000, 22 000 died on the first day and another 17 000 within four months. Over 90% of each city was destroyed.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8.
  • 9. The cathode ray tube was the precursor to the modern day….. TELEVISION! Black and White….. Color…….
  • 10.
  • 11.
  • 12.
  • 13.
  • 14.
  • 15.
  • 16.
  • 18. In Summary, No mass, but speed of light! Can be dangerous! 0 0 Gamma  Fast, but no mass so little energy -1 0 Beta (  Slow and no energy +2 4 Alpha (  Speed and Energy charge Mass (amu) Type of radiation
  • 19.
  • 20. The Gold Foil Experiment…. What is happening? Why are the alpha particles bouncing off?
  • 21. Gold Foil Experiment Rutherford's Experiment
  • 22.
  • 23.
  • 25.
  • 26.
  • 27.
  • 28.
  • 29.