Essay on Science: History of The Periodic Table

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Four-hundred years ago, scientists began identifying substances now know as elements. They began recognising patterns in the properties as the number of know elements grew, leading to the beginning of classification schemes that would come to devise the periodic table as we know it today ("The Periodic Table", n.d.).
In 1789, French chemist Antoine-Laurent de Lavoisier (1743-93) separated 33 substances he considered elements -including light (now know not to exist as an element) and a liquid called ‘Caloric’ (now known not to exist) (Chemical Heritage Foundation, n.d.)- into metals, non-metals and ‘earths’ (Linstead, 2012, p. 115-116).
In 1869 Dmitri Ivanovich Mendeleev a Russian chemist (1834-1907) constructed the first accepted version
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He also played an essential responsibility in the identification of more than 100 isotopes throughout the periodic table. Extension of the periodic table beyond uranium was caused by the discovery that uranium atoms could be bombarded with neutrons creating new elements ("History of the Periodic Table", n.d.). Whilst working with Fermi, Seaborg took out the heaviest elements that were currently placed in the body of the periodic table, and would show them as separate (from the body) naming the elements the Actinide series; the step later permitted proper placement of those subsequently ‘created’ elements. Seaborg perception of the table demonstrates the analogous connection between the actininide elements and rare-earth series thereby their relationship to other elements (Corrosion Doctors , n.d.).
The International Union of Pure and Applied Chemistry (IUPAC) is an organisation founded in 1919 that governs aspects of the periodic table, its elements and other chemistry related subjects in the strive to advance its knowledge (Wikipedia , n.d.). IUPAC sets global standards and guidelines for names, symbols and units. The organisation further analyses claims on the discovery of new elements determining their original pioneers. IUPAC holds the responsibility to provide placement of the element on the periodic table as well as the

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