Francesca Paul


Andrew Lacey


  • Dmitri Mendeleev was born on February 8, 1834 in the Russian province of Siberia. 

  • He had an unusually large family who faced poverty and was said to have around 16 brothers and sisters.

  • When his father went blind, his mother re-opened a glass factory in which Mendeleev worked at a young age. It had originally been started by his father and then closed because it was burnt down.

  • Aged at 16, he moved to Saint Petersburg.


  • Mendeleev attended the Main Pedagogical Institute in St. Petersburg and graduated in 1855
  • Ten days after he was enrolled in school, his mother died of tuberculosis, a disease that had also taken his father, at least one of his siblings, and that Mendeleev himself also battled as a young adult.
  • After teaching in the Russian cities of Simferopol and Odessa, he returned to St. Petersburg to earn a master's degree in chemisty.
  • In 1865 he was appointed professor of chemical technology at the University of St. Petersburg 

Experimental Information 

  • Mendeleev wondered if he could find some way to organize the elements logically.

  • Mendeleev made up a set of cards, one for each of the 63 elements known at the time. Mendeleev wrote the atomic weight and the properties of each element on a card.He rearranged the cards in various sequences until he noticed some gaps in the order of atomic mass.

  • He saw that the behavior of the elements seemed to repeat as their atomic weights increased.

Creation of the Periodic Table

  • Based on properties which appeared with some similarities, he laid out the elements from lightest to heaviest. He discovered that elements that had similar chemical properties also had similar atomic weights.

  • When Mendeleev proposed his periodic table, he noted gaps in the table, and predicted the qualities of still-unknown elements and properties appropriate to fill those gaps.

  • A key feature of his table was its ability to account for undiscovered elements that would fit the pattern.

  • "I saw in a dream, a table, where all the elements fell into place as required. Awakening, I immediately wrote it down on a piece of paper.” ~Mendeleev


  • Because of Mendeleev's discovery we are able to know more about atoms.

  • An atom is the smallest particle that cannot be further divided by normal chemical means and that can maintain its chemical identity.

  • The periodic table tells us the chemical properties of the atoms.
  • The periodic table arranges the chemical elements (which are made up of atoms), ordered by their atomic number, electron configurations, and recurring chemical properties.

Facts about Mendeleev

  • Mendeleev has been credited as being the creator of the first version of the periodic table of elements for which he was awarded the Nobel Prize in Chemistry.

  • The Element Menedelevium (101 Md) was named after him.
  • He was one of the founding members of the Russian Chemical Society and helped open the lines of communications between scientists in Europe and the United States.

  • He was known for his long hair and beard because he only trimmed it once a year.


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by francescagpaul


Public - 9/20/16, 12:30 PM