The Periodic Table of the Elements

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The Periodic Table of the Elements
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J.W. Dobereiner first attempted to put together a
system for classifying the elements in 1827. He
used the idea of the triad.
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Dobereiners Triads
Note In each case, the numerical values for
the atomic mass and density of the middle element
are close to the averages of the other two
elements
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John Newlands Presented the idea of the octave
in chemistry back in 1863. Was laughed out of the
building.
He was able to have the last laugh, however. He
was awarded the Davy Medal in 1887 for his work
after Mendeleevs table was accepted and his
ideas acknowledged.
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Robert Bunsen Burner
Lothar Meyer
Dmitri Mendeleev
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Mendeleev is credited with creating the modern
periodic table of the elements. He gets the
credit because he not only arranged the atoms,
but he made predictions based on his arrangement
which were shown to be quite accurate.
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Here is another link http//chemlab.pc.maricopa.ed
u/periodic/giguere.html
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Trends Within the Periodic Table
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