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NTPC Graduate Tier 1 2025 Shift-2 📅 05 Jun, 2025

In which order did Mendeleev arrange the elements in his periodic table?

A
Decreasing atomic radius
B
Increasing number of neutrons
C
Increasing atomic number
D
Increasing atomic mass
Result Summary
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APEDIA

NTPC Graduate Tier 1
2025 • 05 Jun, 2025 • Shift-2
In which order did Mendeleev arrange the elements in his periodic table?
Correct Answer
Increasing atomic mass
Historical Principle: Dmitri Mendeleev, a pioneering chemist, structured his original periodic table based on the fundamental atomic masses of the elements.Peri......
Ref/Book : NTPC Graduate Tier 1 2025
Ref. Subject General Awareness
Chapter -
Ref. Topic Chemistry
Pg. No -
💡 Analysis & Explanation
Historical Principle ▼
Dmitri Mendeleev, a pioneering chemist, structured his original periodic table based on the fundamental atomic masses of the elements.
Periodic Law Formulation ▼
He observed and posited that the physical and chemical properties of elements are periodic functions of their atomic weights (mass).
Modern Contrast ▼
It was much later that Henry Moseley restructured the table based on increasing atomic numbers, which forms the basis of the modern periodic table.
Conclusion ▼
Therefore, Mendeleev's arrangement strictly relied on increasing atomic mass.
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