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Demonstrations › Atomic Structure

Lecture Demonstrations

Atomic Structure, Periodic Trends

Use of props to demonstrate different types of electromagnetic radiation and atomic structure.


Display of atomic emission lamps containing different gases. Excitation of electrons in the gases result in emission of different wavelengths of light.


Alcoholic solutions of salts are combusted to illustrate that different wavelengths of light are emitted by different materials.

A beam of electrons is produced in a Crooke’s tube. A magnet is brought near one end of the tube and the electron beam is deflected into a bent line.


A beam from a laser pointer is directed through a narrow slit onto the far wall of the lecture room.  An interference pattern can be seen on the wall.


Seemingly average materials, including rocks, are exposed to UV light, producing emission of various colors


A Geiger counter is used to detect radiation from certain objects.


A piece of granular calcium metal is added to water. After a few moments a vigorous reaction takes place producing hydrogen gas and calcium hydroxide.