Kashif,Aaron,Felix,Nestor
Category: Altro
è stato aggiornato: 25 ott 2017
Dmitri Mendeley Timeline
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Created byKashif Naseer
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1) Born in Tobolsk,Siberia(Russia)2) Traveled to Moscow and St. Petersburg with his mother for education
After 10 days mother died of tuberculosis3) Scientist met in one of the first international chemistry conferences and decided
hydrogen to be given the weight of one and all other elements would be
compared to it4) Returned to Russia Became a professor at Technical Institute in St. Petersburg
Published Organic Chemistry Students were having difficulties understanding
chemistry with no clear system or framework to explain relationships of the elements6) Inspired by the card game solitaire he created element cards and attempts to arrange
them with weight and properties on them into a single framework
Info A story told that Mendeleev dream't all the elements fell into place as required
and upon awakening he wrote it down and later drew a table of it.
Unaware he arrange the elements in increasing atomic number order. Left blank spaces as placeholders
predicting it for unknown elements that hasn't been discovered7) a German chemist Julius Lothar Meyer published a paper describing
the same organizations of the elements. The 2 chemist had similar backgrounds
but Mendeleev got the credit because he published his findings first8) Mendeleev noticed that when he put the atoms in order of atomic masses,
some atoms were missing, so Mendeleev left spaces in the periodic table and within
15 years the missing elements were discovered confirming the
acceptance of Mendeleev periodic table.9) a new set of elements, the noble gases, were added to the table10) Death(age 72) St. Petersburg5) Began writing Principles of Chemistry to organize and explain elements
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