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Waveform Audio File Format  |  2002-11-21  |  2.8 MB  |  1 channel  |  11,025 sample rate  |  2 minutes, 12 seconds
Transcription: This program is about chemical periodicity, an idea that brought order to the chemistry of the elements and helped scientists to work out the structure of the atom. Here's the Russian chemist, Dmitry Ivanovich Mendeleev, who was born in 1834 and died in 1907. He called chemical periodicity the periodic law. Whenever scientists dole out the credit for its discovery, Mendeleev always takes pride of place, And this program should help you to understand why. Mendeleev once said that the great idea came to him in the Diet building at Karlsruhe in Germany. There, in 1860, at the first big internatio ...