Dobereiner's triads

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• Döbereiner's Triads — Before the creation of the periodic table by Mendeleev, there were several laws for the classification of the elements. One of such laws was, Dobereiner s Law of Triads. Dobereiner between 1815 and 1829 gave his Law of Triads according to which… …   Wikipedia

• Döbereiner , Johann Wolfgang — (1780–1849) German chemist Born the son of a coachman in Hof an der Saale, Germany, Döbereiner had little formal education and had worked as an assistant to apothecaries in several places from the age of 14. He was largely self taught in… …   Scientists

• Döbereiner, Johann Wolfgang — ▪ German chemist born Dec. 13, 1780, Hof an der Saale [Germany] died March 24, 1849, Jena       German chemist whose observation of similarities among certain elements anticipated the development of the periodic system of elements.       As a… …   Universalium

• Johann Wolfgang Döbereiner — Born December 13 …   Wikipedia

• Johann Wolfgang Döbereiner — Nacimiento 13 de diciembre de 1780 …   Wikipedia Español

• Chemistry: A Volatile History — is a 2010 BBC documentary on the history of chemistry presented by Jim Al Khalili. It was nominated for the 2010 British Academy Television Awards in the category Specialist Factual. Contents 1 Episode 1 – Discovering the Elements 1.1… …   Wikipedia

• Numerology — is any study of the purported mystical relationship between a count or measurement and life. It has many systems and traditions and beliefs. Numerology and numerological divination by systems such as isopsephy were popular among early… …   Wikipedia

• History of the periodic table — The history of the periodic table reflects over a century of growth in the understanding of chemical properties, and culminates with the publication of the first actual periodic table by Dmitri Mendeleev in 1869.[1] While Mendeleev built upon… …   Wikipedia

• periodic law — /pear ee od ik, pear /, Chem. 1. the law that the properties of the elements are periodic functions of their atomic numbers. 2. Also called Mendeleev s law. (originally) the statement that the chemical and physical properties of the elements… …   Universalium

• Periodic table — This article is about the periodic table of the elements . For other uses, see The Periodic Table. The periodic table of the chemical elements (also known as the periodic table or periodic table of the elements) is a tabular display of the 118… …   Wikipedia

• triad — triadic, adj. triadism, n. /truy ad, euhd/, n. 1. a group of three, esp. of three closely related persons or things. 2. Chem. a. an element, atom, or group having a valence of three. Cf. monad (def. 2), dyad (def. 3) …   Universalium