Free Science Videos and Lectures

Sodium is a chemical element which has the symbol Na (Latin: natrium), atomic number 11, atomic mass 22.9898 g/mol, oxidation number +1.

Sodium is a soft, silvery white, highly reactive element...

This science video contains:
explosion, water, burning, reaction, fire, alkali, sodium, na

When potassium is heated is starts reacting with oxygen. Since air is mostly oxygen, the reaction happens pretty quickly and it starts burning.

This science video contains:
heat, burning, reaction, fire, air, oxygen, potassium

A small amount of lithium is heated and it reacts very quickly with oxygen creating a burst.

This video was created by University of Oxford.

This science video contains:
burning, lithium, reaction, fire, air, oxygen

Lithium reacts with chlorine, a violent reaction happens and lithium starts to burn instantly.

This video was done by University of Oxford.

This science video contains:
burning, lithium, chlorine, reaction, fire, university of oxford

A nuclear flask made out of 280 tons of solid steel. It is important that these flasks are safe so they are tested extensively!

At one of the tests where the flask was filled with water and...

This science video contains:
truck, rocket, nuclear waste, nuclear flask, 280 tons, steel, train, crash, damage, intact, burning