Dmitri Mendeleev · Science
How Mendeleev made the boldest gamble in the history of chemistry - describing in exact detail three elements no one had ever seen, purely from the empty boxes in his table - and how the discovery of gallium, scandium, and germanium, each matching his forecast, converted a skeptical world to the periodic law.
You learned how Mendeleev predicted the detailed properties of three undiscovered elements - eka-aluminium, eka-boron, and eka-silicon - and how their discovery as gallium, scandium, and germanium vindicated the periodic law. In your own words, explain how he made the predictions, how close they came, and why successf…
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