Moseley's characteristic X-ray measurements established atomic number as the fundamental ordering parameter for the periodic table. Which statement correctly expresses the modern periodic law?
Options

Question

Moseley's characteristic X-ray measurements established atomic number as the fundamental ordering parameter for the periodic table. Which statement correctly expresses the modern periodic law?

G1 Physics · Accepted Answer

The modern periodic law states that the physical and chemical properties of elements are periodic functions of their atomic numbers. Moseley's X-ray measurements showed a systematic dependence of characteristic frequency on atomic number, providing strong experimental support for using Z rather than atomic mass as the fundamental ordering quantity. Correct option: B.