Ex. 5. Discuss the following topics:
1. The Discovery of the Periodic System of the Elements.
2. Mendeleyev’s Life.
3. Mendeleyev’s Interests.
4. The Periodic System of Elements at Present.
DO YOU KNOW THAT...
Mendeleyev planned to present his paper on the periodic table at the
meeting of the Russian Chcmical Socicty on March
6
, 1869, but on that
day he was ill. His friend N. S. Mcnshutkin (1842-1907), a noted Russian
analytical chcmist who was a colleague at the University of St. Petersburg
read die paper for him. The communication did not evoke any unusual
interest at this meeting.
Достарыңызбен бөлісу: 
