Who arranged elements with similar properties into groups?


Dobereiner’s triad arranged elements with similar properties into groups.

  • Johann Dobereiner, a German chemist, classified different groups of three elements into groups known as triads in 1829.
  • Lithium, sodium, and potassium were one such triad. Physical and chemical properties were used to generate triads. Dobereiner discovered a pattern in the atomic masses of such three elements, as well as other triads.

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