Multiple Choice
How did Dmitri Mendeleev arrange the elements in his original periodic table?
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2. Atoms & Elements
Periodic Table: Classifications
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Who reorganized the elements on the periodic table by increasing atomic number?
A
John Dalton
B
Dmitri Mendeleev
C
Henry Moseley
D
Antoine Lavoisier
Verified step by step guidance1
Understand that the periodic table was initially organized by atomic mass, which was done by Dmitri Mendeleev.
Recognize that the question asks who reorganized the elements by increasing atomic number, not atomic mass.
Recall that Henry Moseley conducted experiments using X-ray spectra to determine the atomic number of elements.
Know that Moseley's work showed that the properties of elements are better correlated with atomic number rather than atomic mass.
Conclude that Henry Moseley is credited with reorganizing the periodic table based on increasing atomic number.
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