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What prediction did Mendeleev make that came true less than 20 years?
Wiki User
∙ 9y ago
He said that te three new elements would be discovered, and he described their properties.
Kianna Orn
Wiki User
∙ 9y agoThe discovery of germanium (which Mendeleev called "eka-silicon") and gallium (which he called "eka-aluminium"). He predicted a half-dozen or so new elements, and the properties he expected each of them to have, based on their position in his just-invented Periodic Table and the properties of the known elements around them. Both gallium and germanium were discovered within 10 years, and did indeed have at least approximately the properties he had predicted, serving as validation that he was on to something.
Wiki User
∙ 7y agoDiscovery of Ga, Ge, Re, Sc, Tc, Pa, Hf.
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Which elements did Mendeleev leave spaces?
What Mendeleyev did with the empty spaces was that he left them empty. Say for example, he didn't know Boron, because it wasn't discovered at that time. He left the spot for Boron empty because he didn't know what it was. He predicted that in the future, scientists would find out about new elements, and his predictions were right. That's why, the modern Periodic Table of Elements has more elements that Mendeleyev had put on his list of elements.
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