📝 Multiple Choice Question
General-science
Mendeleev's Periodic Law was modified, and was adopted as the basis of the Modern Periodic Table.
A
Atomic mass
B
Molar mass
C
Atomic number
D
Similar properties
Explanation
Dmitri Mendeleev originally organized elements by their atomic mass, which occasionally resulted in glaring inconsistencies. Following Henry Moseley's 1913 experiments with X-ray spectroscopy, the law was historically modified to base the table strictly on the atomic number (number of protons).
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