The modern periodic table is based primarily on the work of which scientist?

• A. John Dalton
• B. Dmitri Mendeleev
• C. Henry Moseley
• D. Antoine Lavoisier

Answer: (C)

Verified step by step guidance

1. Understand that the modern periodic table is organized based on atomic number rather than atomic mass.
2. Recall that Dmitri Mendeleev originally arranged elements by increasing atomic mass and predicted properties of undiscovered elements.
3. Recognize that Henry Moseley discovered the concept of atomic number through X-ray spectra, which led to the reorganization of the periodic table by atomic number.
4. Note that this reorganization corrected inconsistencies in Mendeleev's table and is the basis for the modern periodic table.
5. Therefore, the scientist primarily responsible for the modern periodic table's arrangement is Henry Moseley.