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Watch the professor show us Mendeleev's business cards!
For all the basics about mendelevium, check out the Visual Elements Periodic Table.
For amazing photos and facts about mendelevium, check out The Elements by Theodore Gray.
One of Mendeleev’s big achievements was to predict there would be more elements than were known at the time. After his death, different elements were discovered, and some of them fit perfectly into the missing spaces he had left.