A short history of the periodic table
57:35
The Origin of the Elements
7:42
This Element Doesn't Fit the Periodic Table
3:01:41
Intro to Chemistry, Basic Concepts - Periodic Table, Elements, Metric System & Unit Conversion
20:57
Are there Undiscovered Elements Beyond The Periodic Table?
13:37
Una explicación realmente buena sobre los moles
13:43
La idea errónea que nos enseñan sobre la electricidad
1:00:11
What is the Periodic Table? How are Elements Organized?
49:34