Name: _______________________Per: __________

Spectrum Lab

Emission Spectrum of Elements

Record the name of the element. It is on the glass tube. DO NOT TOUCH THE GLASS TUBE!It is hot. You will burn your fingers! Record the color of the ionized gas. Using color pencils, draw the spectral lines for the elements in the boxes below. Be sure to note the brightness of each line as well as its width in your drawings. Be as detailed as possible.

Station 1 Unknown: Element: _____________Color of ionized gas_____________________

Station 2: Element: ____________________Color of ionized gas______________________

Station 3: Element: ____________________Color of ionized gas_______________________

Station 4: Element: ____________________Color of ionized gas______________________

Station 5: Element: ___________________Color of ionized gas_____________________

Station 6: Element:__________________Color of ionized gas_______________

Post-Lab Questions:

1. Describe the difference between an emission spectra, continuous spectra and absorption spectra.

2. How is the electron in an element related to the emission spectrum of that element?

3. Which model of the atom best explains an emission spectrum? Explain.

4. How might a chemist use an emission spectrum?

5. Go to this link http://imagine.gsfc.nasa.gov/science/toolbox/spectra1.html. Describe how an astronomer can use absorption spectra.