Wednesday, November 08, 2006

Atomic Emmission Spectra

Learning Outcome:At the end of the sessions, you must be able to explain how the emission spectra of elements provide for the existence of the energy level

Learning Presentation:

Colors add beauty to life and all the things around us. But what is color and how do see color? Visible light waves are the only electromagnetic waves we can see. We see these waves as the colors of the rainbow. Each color has a different wavelength. Red has the longest wavelength and violet has the shortest wavelength. When all the waves are seen together, they make white light. Direct evidence of this is the rainbow.

Visible Light color is can be separated by lenght of wavwlenght. click here to find out

Elements give out specific color of light when their electrons are exited and promoted to the next energy level (we will discuss this later) this wavelenght helps in the identification of elements that are present in other planets or stars like how helium is discovered in the sun.

TO identify elements present chemist perform a flame test. (Atomic emmssion spectra flame test click here (this requires window media player)


Post a Comment

<< Home