1 / 9

Mendeleev & The Periodic Table

Mendeleev & The Periodic Table. Mendeleev for a Day Activity. Mendeleev’s Table. Organized elements by increasing atomic mass so that elements with similar properties were in the same column. Mendeleev’s Prediction.

pink
Download Presentation

Mendeleev & The Periodic Table

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. Mendeleev & The Periodic Table

  2. Mendeleev for a Day Activity

  3. Mendeleev’s Table • Organized elements by increasing atomic mass so that elements with similar properties were in the same column.

  4. Mendeleev’s Prediction • After Mendeleev placed all the known elements in his periodic table, several empty spaces were left. • In 1871 Mendeleev predicted the existence and properties of elements that would fill three of the spaces. • By 1886, all three of these elements had been discovered.

  5. Mendeleev’s Prediction • Predicted Eka-aluminum in 1871 • Soft metal • Low melting point • Density of 5.9 g/cm3 • Found: Gallium in 1875 • Soft metal • Melting Point29.7 C • Density of 5.91 g/cm3

  6. Mendeleev’s Predictions

  7. Usefulness of His Table • The close match between Mendeleev’s prediction and the actual properties of new elements showed how useful his periodic table could be.

  8. Henry Moseley (1913, British) • Organized elements by increasing atomic number. • Fixed problems in Mendeleev’s arrangement.

More Related