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John A. R. Newlands chemical properties repeated every eight elements for the first few named this the octave rule (compared it to a musical scale)

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Presentation on theme: "John A. R. Newlands chemical properties repeated every eight elements for the first few named this the octave rule (compared it to a musical scale)"— Presentation transcript:

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3 John A. R. Newlands chemical properties repeated every eight elements for the first few named this the octave rule (compared it to a musical scale) Some less observant members of the English Chemical Society considered this absurd, his work was ignored for years. H LiBeBCNOF NaMgAlSiPSCl doremifasolati

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5 “ I began to look about and write down the elements with their atomic weights and typical properties, analogous elements and like atomic weights on separate cards, and this soon convinced me that the properties of elements are in periodic dependence upon their atomic weights.” Mendeleev http://www.aip.org/history/curie/periodic.htm

6 Look at the two slides on Pg 3 & 4. How do they line up? Now look at the two slides on pg 4 & 5. How did Mendeleev’s first table compare to the one we know now. Find at least 5 differences.

7 Draft for first version of Mendeleev's periodic table (17 February 1869). Courtesy Oesper Collection, University of Cincinnati. http://www.chemheritage.org/EducationalServices/chemach/ppt/lm01.html

8 Ti=50Zr=90 V=51Nb=94Ta=182 Cr=52Mo=96W=186 Mn=55Pt=197 Fe=56Ru=104Ir=198 Ni=Co=59Pd=106Os=199 H=1Cu=63Ag=108Hg=200 Be=9Mg=24Zn=65Cd=112 B=11Al=27Ur=116Au=197 C=12Si=28Sn=118 N=14P=31As=75Sb=122Bi=210 O=16S=32Se=79 F=19Cl=35,5Br=80J=127 Li=7Na=23K=39Rb=85Cs=133Tl=204 Ca=40Sr=87Ba=137Pb=207 La=94 Di=95

9 H LiBeBCNOF NaMgAlSiPSCl KCaScTiVCrMnFeCoNiCuZn AsSeBr RbSr ZrNbMo RuRhPdAgCdInSnSbTeI CsBaLuHfTaW OsIrPtAuHgTIPbBi LaCe Th U Known Elements at the time of Mendeleev

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15 http://www.privatehand.com/flash/elements.html http://www.youtube.com/watch?v=DYW50F42ss8 http://www.youtube.com/watch?v=GFIvXVMbII0&NR=1 Go to each of the following links. Describe what is different from one to the next. How many elements (if any) were discovered after this song was written? What did each one help you figure out if anything?

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