Periodic Properties of Elements

Periodic Law and The Periodic Table

• Dmitri Mendeleev (1834-1907)

  • Russian chemistry professor who listed known elements in order of increasing atomic mass.

  • Grouped elements with similar properties, observing that these properties recurred periodically.

  • His tabulation served as the precursor to the modern periodic table.

• Periodic Law and Group Properties

  • Chemical properties of elements reveal a repeating pattern of reactivities.

  • These repeating properties lead to the formation of groups (columns) in the periodic table.

• Development of the Periodic Table

  • Mendeleev's 1869 periodic table accounted for all known elements at the time but contained