PERIODIC TABLE HISTORY
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1
Father of Modern Chemistry
List 33 chemical elements (Oxygen, Sulfur and Hydrogen)
List 33 chemical elements (Oxygen, Sulfur and Hydrogen)
Antione Lavoiser
2
Who invented Law of Triads?
Johann Wolfgang Dobereiner
3
he had identified ten triads, three groups of four, and one group of five.
Gmelin System
4
describing relationships between various groups of metals.
Jean-Baptiste Dumas
5
• Ability of Carbon to bond other 4 elements. (Concept
of Benzene)
• Founder of theory of chemical structure
of Benzene)
• Founder of theory of chemical structure
August Kekule
6
• Law of Octaves
• Arrange the elements according to atomic number
but slightly differ from modern P.T.
• Arrange the elements according to atomic number
but slightly differ from modern P.T.
John Newlands
7
Published periodic table
Dmitri Ivanovich Mendeleev and Juliu Lothar Meyer
8
(Modern Periodic table)
Henry Mosley
9
Verticals
Geoups/Family
10
Horizontal
Periods/Series
11
# of shells
Periods
12
Same valence, same properties
Groups
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