Atomic spectrum

470 views

Published on

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
470
On SlideShare
0
From Embeds
0
Number of Embeds
165
Actions
Shares
0
Downloads
15
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Atomic spectrum

  1. 1. Atomic Spectrum March 25, 2013
  2. 2. Objectives 1. 2. 3. Explain why scientists know the identity of the chemical compositions of stars Describe a flame test Distinguish between absorption and emission
  3. 3.  Atoms can absorb and release energy  When atoms release energy they emit light  Each atom emits only a certain frequency of light
  4. 4. Shell Model   Electrons can jump between shells when excited When they jump back down they release that energy as light
  5. 5. Na Li B Cu Ca
  6. 6. Spectroscope  White light separates into its color components by a prism  Each color corresponds to a different frequency of electromagnetic radiation
  7. 7. Spectroscope
  8. 8. Spectroscope  Observe color components of any light source
  9. 9. Atomic Spectrum  Light from atoms consist of a number of discrete frequencies rather than a continuous spectrum  Pattern of frequencies of a particular element – atomic spectrum
  10. 10.  Atomic spectrum – atoms “finger print”  Emission – the frequencies the gas emitts Absorption – frequencies of all white light EXCEPT those that are absorbed by the gas 
  11. 11. •  Emission  Absorption
  12. 12.  http://jersey.uoregon.edu/vlab/elements/Elemen
  13. 13.  http://video.google.com/videoplay?docid=25558

×