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Periodic Properties of Elements

Periodic Law and The Periodic Table

  • Dmitri Mendeleev (1834-1907):

    • Russian chemistry professor who first listed known elements.

    • Arranged elements in order of increasing atomic mass.

    • Grouped elements that exhibited similar properties.

    • Noticed that similar properties recurred in a periodic fashion.

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

  • Periodic Law (Observational):

    • Observations of chemical properties of elements reveal a repeating pattern of reactivities.

    • These recurring properties led to the formation of