Question

Explain notes on periodic classification of elements

Answer 1

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❏According to it, when elements are arranged in order of increasing atomic mass, groups of three elements having similar chemical properties are obtained.

❏In this, atomic mass of middle element is arithmetic mean of atomic masses of other two elements. He failed to arrange all known elements in form of triads.

Answer 2

❏According to it, when elements are arranged in order of increasing atomic mass, groups of three elements having similar chemical properties are obtained.

❏In this, atomic mass of middle element is arithmetic mean of atomic masses of other two elements. He failed to arrange all known elements in form of triads.

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