2. B. Spectral Lines Light can be divided into different colors, based on the amount of energy in the light White light R O Y G B I V Low energyHigh energy

3. Each electron jump releases quanta of energy seen as a color Spectral lines Thin lines of light given off as electrons jump More energy released, see different color Small jump =redLarge jump =Blue If there are several different types of electron jumps, the colors from each jump are blended together into one color Put this light through a prism to separate them Click on the rainbow to watch a short film on how you can separate spectal line

4. Atoms with electrons jumping prism Spectral lines Group of spectal lines = bright line spectrum Each element has its own set of spectral lines Make sure you click on the emission button Now click on the rainbow to look at the spectral lines of different elements. Make sure you click on the emission button to see spectral lines. Click on different elements and notice where you find the different colors Here’s another way to look at it!

5. What did you notice about the location of the different colors? The colors will all appear in the same area (The red lines will always be on the same side)

6. Element X Element Y Elements X and Y combined 3 different electron jumps A group of elements would create a combination of spectral lines Notice how the combination of X and Y is just a combination of the individual spectral lines? Just sketch these in your notes, you don’t need the exact location!

7. Part of your homework is to determine the identity of elements in two unknown samples. You will do this by 1.Click anywhere to start the project 2.Click on the unknown #1 tube and allow it to create a set of spectral lines (Make sure you click on the words, not the tubes) 3.Using a fine tipped marker, GENTLY trace the lines from the screen into the box on your paper labeled “Unknown #1” 4.Repeat this procedure for unknown #2 5.Click on the tubes containing the know elements. If ALL the spectral lines in the element appear in your unknown, then this is one element in your mixture. 6.Repeat for all the known elements until you can account for all the spectral lines in both unknown samples When you finish this, go onto the rest of the notes

8. Ne SN HOC #1#2 End project and finish notes

9. He Click here to reset End project and finish notes NeSNHOC#1#2

10. S End project and finish notes NeSNHOC#1#2 Click here to reset

11. H End project and finish notes NeSNHOC#1#2 Click here to reset

12. O End project and finish notes NeSNHOC#1#2 Click here to reset

13. C End project and finish notes NeSNHOC#1#2 Click here to reset

14. N End project and finish notes NeSNHOC#1#2 Click here to reset

15. Unknown 1 End project and finish notes NeSNHOC#1#2 Click here to reset

16. Unknown #2 End project and finish notes NeSNHOC#1#2 Click here to reset

17. Practical Applications So atoms give off colored lights, how do we use this? B. Fireworks Different colors in fireworks come from the different metals placed in the explosive C. Analysis Can determine the impurities in a sample (of water) by looking for specific spectral lines The intensity of the lines indicates how much of the impurity is present Lead testing of water A. Neon Lights Gas in a tube can will give off colored lights when excited by electricity