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Johann Dobereiner Was Born December 13, 1780, In Hof Bavaria.
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Johann Dobereiner Arranged Elements In Increasing Order Of Their Atomic Weight.
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Discovered The Relative Atomic Mass Of The Middle Element In Each Triad Was Close To Average Of The Relative Atomic Masses Of The Other 2 Elements.
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Johann Dobereiner Developed Groups Of 3 Elements With Similar Properties.
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Discovered The Existence Of Families Of Elements With Similar Chemical Properties.
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Johannn Dobereiner Died March 24, 1849 Of Young Age.