Here's a new chlorine video demonstrating this extremely reactive and dangerous gas, which was used as a weapon in World War I. This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

Chromium is element number 24. This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

Check out some samples of cobalt, and learn about its role in colour televisions. This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

There has been debate about whether the periodic table's newest element should have the symbol Cp or Cn? This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

Here's a new video about copper, including a nice demonstration and some stories from The Professor. This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

Curium is element number 96. This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

We're in Germany for a new and improved video about element 110, showing you exactly where it was created. This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

Dubnium seems to be an element no-one knows much about. This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

Dysprosium is element number 66 on the periodic table. This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

Hear about Einsteinium from a scientist who looks like the man himself! This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

In our new video about Erbium, The Professor explains why it is perhaps the most important element for websites like YouTube. This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

Europium is element number 63. This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

Fermium is named after a pioneer in the field of radioactivity and nuclear power. This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

We visit a fluorine expert to finally show you this incredibly reactive element in action. This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

Throwing Francium into water would be "the YouTube video of the century" according to our favourite chemistry professor! But is it possible? This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

Gadolinium is element number 64. This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

Our updated video about Gallium includes an experiment called "the beating heart" and news of a breakthrough in a our very own labs! This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

A shiny metal named after Germany. This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

Hafnium is element number 72. This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.

The Professor once claimed to know nothing about Hassium, but he learned more after visiting Darmstadt in Germany. This video is one of the 118 clips included in the periodic table of elements themed collection created by Brady Haran and the University of Nottingham in the UK.