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Moseley showed the more fundamental property to be:
AAtomic weight
BAtomic radius
CAtomic volume
DAtomic number
Answer & Solution
Correct answer: D. Atomic number
1. The straight line came with atomic number, not atomic mass.
2. So atomic number is more fundamental than atomic mass.
3. The Periodic Law was modified accordingly.
_Source: syllabus Chemistry Part I, Chapter 3, Classification of Elements and Periodicity in Properties._
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