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Created by woodchurchscience on 11/01/2009
Last updated: 06/11/09 at 04:43
element 110 officially named. first created by fusion 9.11.1994
made new elements he called 'actinides'
henry mosely discovered atomic numbers using x ray wavelengths
william ramsay discovered noble gases
produced table arranged periodically but with gaps
observed repeating patterns he called law of octaves
developed table with better features than mendeleev
produced table same time as mendeleev but published too late
discovered elements had periodicity
established values for atomic weights
introduced chemical symbols
arranged elements into triads
wrote first list of elements and metals and non-metals