Henry Gwyn-Jeffreys Moseley (1887-1915)
English physicist, was born in Weimouth, in 1887, and died in combat in Dardanelles, Greece, in 1915.
Studied in Oxford, he became Physics assistant at the University of Cambridge, where he was co-worker of Rutherford. Performed a systematic study of X-ray spectra, being responsible for the determination of the wavelength of K-alfa and L-alfa of several elements. Also determined the mathematical relation between the radiation wavelength and the atomic numbers of the emitting elements. Pointed out the existence of holes in the periodic table for the elements Z=43, 61, 72 and 75, which were discovered much later.