Moseley scientist biography posters

English physicist (1887–1915)

For other people named Henry Moseley, see Henry Moseley (disambiguation).

Henry Gwyn Jeffreys Moseley (; 23 November 1887 – 10 August 1915) was an English physicist, whose contribution to the science of physics was the justification from physical laws of the previous empirical and chemical concept of the atomic number.

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Henry Moseley was born on this day in !

Henry Moseley was an English churchman, mathematician, and scientist.

RM G15CFK–Henry Moseley (), English physicist.

English physicist who experimentally demonstrated that the major properties of an element are determined by the atomic number, not by the atomic weight.

This stemmed from his development of Moseley's law in X-ray spectra.

Moseley's law advanced atomic physics, nuclear physics and quantum physics by providing the first experimental evidence in favour of Niels Bohr's theory, aside from the hydrogen atom spectrum which the Bohr theory was designed to reproduce.

That theory refined Ernest Rutherford's and Antonius van den Broek's model, which proposed that the atom contains in its nucleus a number of positive nuclear charges that is equal to its (atomic) number in the periodic table.^[1][2]

When World War I broke out in Western Europe, Moseley left h