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Question: Answered & Verified by Expert
What is the basic difference in approach between Mendeleev's Periodic Law and the Modern Periodic Law?
ChemistryClassification of Elements and Periodicity in PropertiesNEET
Options:
  • A Mendeleev's law is based on atomic number, while the Modern Periodic Law is based on atomic mass.
  • B Mendeleev's law emphasises the periodicity of properties, while the Modern Periodic Law emphasises the arrangement of elements based on electronic configuration.
  • C Mendeleev's law includes all known elements, while the Modern Periodic Law excludes elements beyond a certain atomic number.
  • D Mendeleev’s Periodic Law states that the physical and chemical properties of elements are periodic functions of their atomic weights. On the other hand, the Modern Periodic Law states that the physical and chemical properties of elements are periodic functions of their atomic numbers.
Solution:
1787 Upvotes Verified Answer
The correct answer is: Mendeleev’s Periodic Law states that the physical and chemical properties of elements are periodic functions of their atomic weights. On the other hand, the Modern Periodic Law states that the physical and chemical properties of elements are periodic functions of their atomic numbers.
Correct Option is : (D)
Mendeleev’s Periodic Law states that the physical and chemical properties of elements are periodic functions of their atomic weights. On the other hand, the Modern Periodic Law states that the physical and chemical properties of elements are periodic functions of their atomic numbers.

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