. Modern periodic law was proposed by


A: Dmitri Mendeleev

B: Henry Moseley

C: J.A.R. Newlands

D: Niels Bohr

 

Best Answer

Explanation:

  • Modern periodic law propounded that “the physical and chemical properties of the elements are periodic function of their atomic numbers”.
  • Henry Moseley proposed modern periodic law in 1913.
  • Henry Moseley detected consistency in the characteristic X-ray spectra of elements by plotting against atomic numbers.
  • Henry Moseley showed that atomic number is the fundamental property of an element.
  • Modern periodic law utilized atomic numbers for the arrangement of elements and to depict their periodic properties along the periods and groups.
  • Dmitri Mendeleev introduced periodic law and periodic table of elements based on atomic weight.
  • John Alexander Newlands propounded law of octaves in 1865.
  • Niels Bohr introduced a quantized shell atomic model for explaining electrons stability around the nucleus in 1913.

Final Answer:

Hence, the correct option is B: i.e. Henry Moseley.

 

 

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