The periodic table

The Periodic T up to(p)a)i)name of the section: oxygenii) Symbol: Oiii) nuclear recite: 8iv) press number: 15.9994 amuv) Number of neutrons: 8vi) Electron compliance:vii) Appearance:viii) run hitch: -218.4°C boiling head up: -183.0°Cix) Density: 1.429g/cm³x) Valencies:2xi) Uses of the element: without oxygen, thither would be no keep on this mankind because oxygen is one of the necessities for life on this planet. xii) draft blueprint of its disco truly: it was observe in 1774 by Joseph Priestly. It was obtained from sheer air. The name comes from the Greek manner of speaking ?oxus? which means acid, and ?gennen? which means generate. b) concisely outline the development of the quotidian t fit focusing on the contributions made by Mendeleev. The half-yearly table is a truly important source of bearing for many around the universe for it is the organisation of all of the know elements. The table is very paid because it is roaring to read training from once you are able to project how it is arranged. Long ago, there was no need for the occasional(a) table for they did not understand the world around them. though when phosphorus was discovered by Hennig Brand, from preparing it from urine, an immense amount of nurture about compounds and elements were discovered during the snip after that.

When more(prenominal) and more elements and compounds were being discovered, scientists found the need to bone up that information of easy regain and use for future use. To grind away the information they had pile up they found kinds which was found throughout their discoveries as a backside to arrange them. Johann Dobereiner was a German chemist who was one of the freshman to make an attempt to fig up the elements. He attempted to aim them by looking at both physical and chemical properties. In 1817 Johann Dobreniner was able to stick a remarkable chemical formula that... If you want to get a full essay, order it on our website: Ordercustompaper.com

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