From hydrogen to ununoctium, this collection of videos has everything you need to begin teaching about the periodic table. Offering descriptions of each element and interesting experiments...

Building upon the previous video about structure, this resource lays the building blocks for generating an action potential and transmitting a signal from dendrites through the axon. The topics are pretty detailed. Salman Khan also talks...

This is a brief correction to the video detailing the pumping of three sodium ions and two potassium ions. There is also a letter from a professor providing information about the ratio of three to two ions and explaining that the...

What do amazonite, heliotrope, carnelian, and diamonds have in common? There are all crystals and members of one of the six crystal families. Viewers of a fascinating short video learn about the molecular structure of crystals that cause...

Does pain really indicate gain when it comes to muscle aches? A short, animated video details the science behind the pain associated with muscle fatigue.

Many scientists consider potassium evil. The enchantingly explosive video demonstrates just some of the dangers of this element. It covers the basic facts, common reactions, and safety considerations when working with potassium. The...

Potassium is violently reactive, yet a biological necessity in our bodies. View this fascinating video as part of the series to introduce young chemists to the world of elements.

A review of the electron configurations and orbital notations with a focus on K, Ca, and Sc. [12:33]

Demonstrations of potassium's very reactive nature with water, oxygen, and sodium. [4:32]