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Mendeleev's Periodic Table was arranged primarily based on which property of elements?
  • a)
    Atomic mass
  • b)
    Electronegativity
  • c)
    Ionization energy
  • d)
    Atomic radius
Correct answer is option 'A'. Can you explain this answer?
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Mendeleevs Periodic Table was arranged primarily based on which proper...
Mendeleev's Periodic Table was initially arranged based on increasing atomic mass. He noticed that elements with similar properties appeared at regular intervals when arranged in order of increasing atomic mass.
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Mendeleevs Periodic Table was arranged primarily based on which proper...

Arrangement based on Atomic Mass:
Mendeleev's Periodic Table was primarily arranged based on the atomic mass of elements. He noticed that when elements were arranged in order of increasing atomic mass, certain properties repeated at regular intervals. This led him to create the Periodic Table where elements with similar properties were grouped together.

Development of Periodic Table:
Mendeleev arranged the elements in rows and columns based on their atomic mass. He left gaps in his table for undiscovered elements and predicted their properties based on the known elements around them. This foresight led to the discovery of new elements like gallium and germanium.

Modern Periodic Table:
Although the modern Periodic Table is arranged based on atomic number rather than atomic mass, Mendeleev's original table laid the foundation for the organization of elements. The periodicity of properties is still evident in the modern table, where elements in the same group have similar chemical behaviors.

Significance of Atomic Mass:
Atomic mass represents the average mass of an element's isotopes, taking into account their relative abundance. It is a fundamental property of elements and played a crucial role in the development of the Periodic Table. While atomic mass is no longer the primary factor in organizing the elements, it remains an important characteristic used to identify and classify elements.
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Mendeleevs Periodic Table was arranged primarily based on which proper...
Atomic mass
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