What was so important about the discovery of gallium scandium and germanium for the acceptance of Mendeleev theory about the organization of the elements?

Answer 1

In 1875, the element gallium was discovered by P.E. Lecoq de Boisbaudran. First proposed to exist by Dmitri Mendeleyev in 1871 based on gaps in his newly created Periodic Table of Elements. He did not discover gallium by accident. For 15 years, he had been studying the different chemical elements. Lecoq de Boisbaudran knew that the element between aluminum and indium was missing. He also knew about Mendeleev's prediction. Lecoq de Boisbaudran wanted to learn more about the spectra of elements which finally lead him to gallium. He thought that gallium or element 31 might be found in zinc ores. He had no success until he realized he was using too little material. That same year, Lecoq de Boisbaudran was given several tons of zinc ore by miners for his research. Out of this ore, he was able to produce a few grams of nearly pure gallium. Lecoq de Boisbaudran had to work through a large amount of zinc ore, but his assumption was correct. The missing element was found to be in the ore, but only very small amounts. "August 27, 1875, between three and four at night, I perceived the first indications of the existence of a new element that I named gallium in honor of France (Gallia)." Also gallus, meaning "rooster"after himself 'Lecoq'. He wrote in one of his note books. Gallium was reduced to the metallic state for the first time in November, 1875, by electrolysis of a solution, containing ammonia, of its sulphate. The prior thoughts of Mendeleev are proven true. The low melting point of gallium is difficult to make up with what the theory allowed it to predict. This made it hard to keep doing research, because it was not technically allowable. Lecoq de Boisbaudran believed that neither his research nor Mendeleev's research would've lead to this discovery if he hadn't followed a particular method for many years. Gallium does not exist in pure form in nature. Found throughout the crust in minerals like bauxite, germanite and coal. It is produced as a byproduct of zinc and copper refining. Around 30 tons per year are produced worldwide. Did you know? Gallium wets glass or porcelain and forms a brilliant mirror when it is painted on glass. This is my favorite thing I learned from this project.

Answer 2

Mendeleev in his periodic table left some spaces below Al and called it as Eka Al ( presently it is the Gallium ). By this name he tells the up coming chemists that there is a new element with the property of Aluminium.Thus he contributes in discovery of Gallium...!

Answer 3

The close match between Mendeleevs prediction and the actual properties of new elements showed how usefullhis pariodic tabel could be.

Answer 4

The disovery confirmed Mendeleev's theory and the basic framework for the Periodic Table of Elements. :)

Answer 5

These discoveries confirmed Mendeleev forecasts.

Answer 6

This discovery was an important confirmation of the validity of the periodic table of Mendeleev.

Answer 7

The discovery of these elements was a proof in favor of the periodicity law.

Answer 8

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