modern periodic law

Question

Modern periodic law was given by:

RankGuru · Accepted Answer

**Henry Moseley** discovered that the X-ray spectra of elements show a linear relationship between frequency and atomic number.
- He concluded that the **Atomic Number ($Z$)** (the number of protons) is the fundamental property of an element, not atomic mass.
- **Modern Periodic Law**: "The physical and chemical properties of the elements are periodic functions of their atomic numbers."
- Mendeleev used atomic mass, Newlands used Octaves, and Dobereiner used Triads.

Rank Guru

modern periodic law

Select the correct option: