What element was discovered 6 years after Mendeleev created his diagram? Where did its name originate?

Anonymous2011-10-11T18:49:17Z

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Gallium, discovered by Paul-Emile Lecoq de Boisbaudran in 1875.
Word Origin: Latin Gallia, France and gallus, a translation of Lecoq, a cock (name of its discoverer was Lecoq de Boisbaudran)