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Radioactivity
This nugget explains the concept of radioactivity, its types and mathematical expressions and examples.
Professor Dave Explains
Practice Problem: Radioactive Half-Life
All radioactive nuclei have a particular half-life, or the time it takes for their concentration to be cut in half. Given the half-life of one such nuclide, can you find the decay constant, and the fraction of nuclei left over after a...
Curated Video
Discovery of the Atom
The story of New Zealand scientist Ernest Rutherford, who revolutionised science by discovering the structure of the atom in 1908. Chemistry - Atoms And Bonding - Learning Points. In 1908, Ernest Rutherford conducted the gold leaf...