Henry Moseley showed that periodicity depended upon atomic number. He rearranged the periodic table based on atomic number rather than atomic mass, providing a more accurate representation of the periodic trends.
Henry Moseley
In 1914 Henry Moseley found a relationship between an element's X-ray wavelength and its atomic number (Z), and therefore rearranged the table by nuclear charge / atomic number rather than atomic weight. Before this discovery, atomic numbers were just sequential numbers based on an element's atomic weight. Moseley's discovery showed that atomic numbers had an experimentally measurable basis.
Henry Moseley discovered a relation between X-ray spectra and the atomic number of chemical elements.
Henry Moseley, a British physicist, made this discovery in 1913 through his experiments with X-ray spectra. Moseley's work led to the reorganization of the periodic table based on atomic number instead of atomic weight.
Henry Gwyn-Jeffreys Moseley in the 1910s.
1913
The concept of atomic number was developed by physicist Henry Moseley in 1913. Moseley's work on X-ray spectra led to the realization that each element had a unique atomic number, which directly correlates to the number of protons in its nucleus.
Henry Moseley
Henry Moseley
Henry Moseley
The concept of atomic number was proposed by Henry Moseley, a British physicist, in 1913. Moseley's research on X-ray spectra of elements led to the reorganization of the periodic table based on atomic number. His work established the modern understanding of the organization of elements by their atomic numbers.
Henry Moseley sorted the chemical elements on the Periodic Table in order by their atomic numbers. Moseley was a British chemist who had studied under Rutherford.
Henry Moseley
Henry Moseley discovered the concept of atomic number and its significance in organizing the elements in the periodic table. His work helped to establish a more accurate and systematic way of arranging elements based on their number of protons in the nucleus. This laid the foundation for the modern periodic table of elements.
Henry Moseley
Henry Moseley in 1913.