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Dmitri Mendeleev

Dmitri Mendeleev. 1834-1907. Mendeleev’s great achievement:. Arranging all of the ___________________ into groups possessing similar properties. The ____________ at that time were identified by their ____________________. Mendeleev’s first sketch of a periodic table of the elements.

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Dmitri Mendeleev

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  1. Dmitri Mendeleev 1834-1907

  2. Mendeleev’s great achievement: • Arranging all of the ___________________into groups possessing similar properties. • The ____________at that time were identified by their ____________________. Mendeleev’s first sketch of a periodic table of the elements

  3. Details of how Mendeleev designed the first Periodic Table of Elements • He wrote down information on each __________ on cards.  • He noticed that the ________________ (we now refer to as the _______________) could be used to rank the elements from lightest to heaviest.    

  4. Details of how Mendeleev designed the first Periodic Table of Elements • Mendeleev noticed that if you looked at their ___________________there was a ___________________, especially if you left spaces where the properties did not fit.  • He stressed that there was ______________, and that this order would help ___________________not yet discovered.    

  5. Mendeleev’s table as published in 1869, with many gaps and uncertainties

  6. Details of how Mendeleev designed the first Periodic Table of Elements • Mendeleev predicted the properties of _________, _________, and _______.   • Gallium, scandium, and germanium were also found to fit his predictions.  • There were some discrepancies, but the format of the table is the basis of today’s periodic table.    • Mendeleev’s table as published in _________.

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