TED-Ed
TED-Ed: The genius of Mendeleev's periodic table - Lou Serico
The elements had been listed and carefully arranged before Dmitri Mendeleev. They had even been organized by similar properties before. So why is Mendeelev's periodic table the one that has endured? Lou Serico explains via Ekaaluminium,...
Curated Video
Radioactive Half-Life
Discover how radioactive substances change over time, and how this affects whether they are hazardous to humans. Physics - Energy And Radioactivity - Learning Points. Dangerous radioactive substances will not be dangerous forever due to...
University of Nottingham
University of Nottingham: Periodic Table of Videos: Technetium
Introduction to technetium and the radioactive properties that allow it to be used in medical procedures for disease diagnoses. [10:45]