Dmitri Mendeleev formulated a periodic table of the elements | Investigated composition of petroleum

Dmitri Mendeleev – creator of first periodic table

Article on Dmitri Mendeleev

Biography & Contributions

Dmitri Mendeleev, a Russian chemist and Nobel laureate born on February 08, 1834 – died on February 02, 1907. Mendeleev was formulator of periodic law for elements and created his own version of periodic table elements. On November 22, 1875 Mendeleev predicted qualities of three new elements like ekasilicon, ekaaluminium and ekaboron (germanium, gallium and scandium respectively). Element 101 Md (Mendelevium) named after him.

He also investigated the composition of petroleum and worked on capillarity of liquids phenomenon. In the field of physical chemistry he investigated the expansion of liquids with heat and devised a formula similar to Gay-Lussac's law. He invented pyrocollodion, a kind of smokeless powder based on nitrocellulose.

Dmitri Mendeleev considered as father of periodic table, for the following reasons like

  • He arranged elements into their correct places in the table
  • Mendeleev corrected relative atomic mass of the elements
  • Predicted properties of five elements and their compounds

Mendeleev was received Davy medal of the Royal Society in the year of 1882, Copley medal in the year of 1905, Nobel Prize for periodic law in the year of 1906.

Gay-Lussac's law

Gay-Lussac's law is defined as pressure of a sample of gas at constant volume, is directly proportional to its temperature in Kelvin.

Facts about germanium

Germanium is considered as a semi-metal. It is a very important semiconductor material. Germanium has been found in the atmosphere of Jupiter and in distant stars. Germanium is available through the treatment of germanium dioxide (GeO2) with carbon or hydrogen.

Germanium is widely distributed in ores of other metals, such as zinc, and that which is required for manufacturing purposes is recovered as a by-product from the flue-dusts of zinc smelters. Germanium used as an alloying agent and as a catalyst, infrared spectroscopes and infrared detectors.

Facts about gallium

Gallium is the only metal, except for other periodic table elements like mercury, caesium, and rubidium, which can be liquid near room temperatures. Gallium easily alloys with most metals and has semiconductor properties. Gallium compounds like Gallium arsenide are used in semiconductor production i.e., laser diodes, light-emitting diodes and solar panels. It is also used to create brilliant mirrors.

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