1 / 33

The Evolution of the Periodic Table: From Dobereiner to Mendeleev

This article explores the historical development of the periodic table of elements, starting with J.W. Dobereiner's classification system using triads in 1827. It highlights John Newlands' octaves concept in 1863 and emphasizes Dmitri Mendeleev's pivotal role in creating the modern periodic table, known for his accurate predictions based on atomic arrangements. The piece also touches upon the contributions of Robert Bunsen and Lothar Meyer, providing a comprehensive view of the major milestones in the understanding of elemental classification.

cachet
Télécharger la présentation

The Evolution of the Periodic Table: From Dobereiner to Mendeleev

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Periodic Table of the Elements

  2. J.W. Dobereiner first attempted to put together a system for classifying the elements in 1827. He used the idea of the triad.

  3. Dobereiner’sTriads Note: In each case, the numerical values for the atomic mass and density of the middle element are close to the averages of the other two elements

  4. John Newlands – Presented the idea of the octave in chemistry back in 1863. Was laughed out of the building. He was able to have the last laugh, however. He was awarded the Davy Medal in 1887 for his work after Mendeleev’s table was accepted and his ideas acknowledged.

  5. Robert Bunsen “Burner” Lothar Meyer Dmitri Mendeleev

  6. Mendeleev is credited with creating the modern periodic table of the elements. He gets the credit because he not only arranged the atoms, but he made predictions based on his arrangement which were shown to be quite accurate.

  7. Here is another link http://chemlab.pc.maricopa.edu/periodic/giguere.html

  8. Trends Within the PeriodicTable

More Related