the periodic table of the elements. j.w. dobereiner first attempted to put together a system for...

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The Periodic Table of the Elements

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Page 1: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

The Periodic Table of the

Elements

Page 2: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of the triad.

Page 3: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Dobereiner’s Triads

Element Atomic Mass Average

Density

Average

Cl

Br

I

35.5

79.9

126.9

81.2

1.56

3.12

4.95

3.25

Ca

Sr

Ba

40.1

87.6

137.3

88.7

1.55

2.6

3.5

2.53

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

Page 4: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

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 Mendeleev’s table was accepted and his ideas acknowledged.

http://falcon.sbuniv.edu/~ggray.wh.bol/CHE1104/newlands.jpg

Page 5: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Lothar Meyer

Dmitri Mendeleev

Robert Bunsen

“Burner”

Page 6: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

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.

Page 7: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 8: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 9: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 10: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 11: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Here is another link

http://chemlab.pc.maricopa.edu/periodic/giguere.html

http://chemlab.pc.maricopa.edu/periodic/giguere.html

Page 12: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 13: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 14: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Trends Within the

Periodic Table

Page 15: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 16: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 17: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 18: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 19: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 20: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 21: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 22: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 23: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 24: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 25: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 26: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 27: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 28: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 29: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 30: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 31: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 32: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Page 33: The Periodic Table of the Elements. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of

Attempts Made by Johann Dobereiner and Johann Newlands

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