Science, civilization and society

Mendeleyev's prediction of new elements

Predictions of properties of elements made by Dmitri Mendeleyev
(Bensaude-Vincent, 1995b)
	predictions	later determinations
atomic weight specific gravity atomic volume	Eka-aluminium 68 6.0 11.5	Gallium* 69.9 5.96 11.7
atomic weight oxide specific gravity of oxide sulphate	Eka-boron 44 Eb₂O₃ 3.5 Eb₂(SO₄)₃	Scandium** 43.79 Sc₂O₃ 3.864 Sc₂(SO₄)₃
atomic weight specific gravity atomic volume oxide specific gravity of oxide chloride boiling point of chloride density of chloride non-gaseous fluoride ethyl compound boiling point of ethyl compound specific gravity of >ethyl compound	Eka-silicon 72 5.5 13 EsO₂ 4.7 EsCl₄ < 100°C 1.9 EsF₄ EsAe₄ 160°C < 1	Germanium*** 72.3 5.469 13.2 GeO₂ 4.703 GeCl₄ 86°C 1.887 GeF₄.3H₂O Ge(C₂H₅O)₄ 160°C 0.96
* discovered 1875 by Lecoq de Boisbaudran discovered 1879 by Nilsen * discovered 1866 by Winkler

Reference

Bensaude-Vincent, B. (1995) Mendeleyev: the Story of a Discovery. In: M. Serres (editor): A History of Scientific Thought, Elements of a History of Science. Blackwell, Oxford, 556 - 582. (Translation of Éléments d'Histoire des Sciences, Bordas, Paris, 1989).

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