Moseley experiment

Moseley's experiment involved using X-ray spectroscopy to study elements. He observed that each element produces X-rays with specific frequencies, which increase systematically with the element's atomic number (the number of protons in its nucleus). By measuring these frequencies, Moseley established a clear relationship between an element's atomic number and its properties, leading to a more accurate organization of the periodic table. This experiment demonstrated that atomic number, not atomic weight, is the fundamental property defining an element. Moseley's work helped in understanding atomic structure and resolving confusion caused by elements with similar atomic weights.