The periodic table

The Periodic T up to(p)a)i)name of the element: oxygenii) Symbol: Oiii) atomic number: 8iv) press number: 15.9994 amuv) Number of neutrons: 8vi) Electron material body:vii) Appearance:viii) run distributor point: -218.4°C boiling point: -183.0°Cix) Density: 1.429g/cm³x) Valencies:2xi) Uses of the element: without oxygen, there would be no look on this earth because oxygen is one of the necessities for life on this planet. xii) draft outline of its disco truly: it was ascertained in 1774 by Joseph Priestly. It was obtained from pellucid air. The name comes from the Greek run-in ?oxus? which means acid, and ?gennen? which means generate. b) concisely outline the development of the mundane table focusing on the contributions made by Mendeleev. The periodical table is a very important source of facts of life for many around the beingness for it is the organisation of all of the know elements. The table is very profitable because it is roaring to read breeding from once you are able to take in how it is arranged. Long ago, there was no need for the periodic 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 information about compounds and elements were discovered during the clock after that.

When more(prenominal) and more elements and compounds were being discovered, scientists found the need to chock up that information of easy access and use for future use. To calculate the information they had pile up they found kinds which was found end-to-end their discoveries as a nates to arrange them. Johann Dobereiner was a German chemist who was one of the freshman to make an atte! mpt to deck out the elements. He attempted to organise them by looking at both physical and chemic properties. In 1817 Johann Dobreniner was able to occur a remarkable pattern that... If you want to get a full essay, order it on our website: OrderEssay.net

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