Spec references J248: C2.2a, C2.2b, C2.2c J250: C2.2a, C2.2b, C2.2c. This video explains the arrangement of the periodic...
The story of how the elements were discovered and mapped begins with the alchemists who questioned that the world...
Professor Jim Al-Khalili looks at how the early scientists' bid to decode the order of the elements was driven b...
Norman Lockyer recorded a new yellow line by observing the sun through London smog and, assuming the new element to be a metal, named ...
Gallium is in a liquid state over the widest range of temperatures than any other element.
Robert Bunsen was a German chemist responsible for the invention of the Bunsen Burner.
Spec references J248: C2.2i J250: C2.2i. A quick recap of how the periodic table is arranged including groups, period...
Spec references J248: C4.1a. Demonstration of reactions of lithium, sodium and potassium with water (Contains hi...
Silicon was discovered by Jöns Jacob Berzelius, a Swedish chemist, in 1824 by heating chips of potassium.
Spec references J248: C4.1a J250: C4.1a. Professor Jim Al-Khalili describes properties of potassium and some of its u...
Lavoisier was the first scientist to define what an element was.
The story of how Joseph Priestley discovered oxygen.
Cavendish accidentally discovered hydrogen, the first elemental gas, when experimenting with air.
Phosphorus was discovered when Brandt was attempting to isolate gold from his urine.
Mercury is fourteen times heavier than water, and so dense even a steel bolt will float in it.
Spec references J248: C2.2i J250: C2.2i. An account of how Mendeleev arranged the elements by atomic mass t...
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