On the basis of which property did Mendeleev arrange the elements?

  • A
    Atomic number
  • B
    Atomic mass
  • C
    Electronegativity
  • D
    Valency

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Briefly describe the contributions of various scientists to the development of the Periodic Table.

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Which of the following information was not known at the time when Mendeleev's periodic table was constructed?

"The properties of elements are periodic functions of their atomic weights." This periodic law was given by

The element or elements whose position is anomalous in the periodic table is

The most important active step in the development of the periodic table was taken by

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