Question

What were the two criteria used by mendelev to classify the elements in his periodic table?

definite any correct answers !!​

Answer 1

Answer:

•Atomic mass: elements are arranged in the order of increasing atomic masses.

•The formulae of the hydrides and the oxides formed by the various elements

Answer 2

1) elements were arranged in increasing order of their atomic mass
2) similarity of chemical properties: elements with similar properties should be placed in same group.
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