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Henry G. J. Moseley, known to his friends as Harry, [5] was born in Weymouth in Dorset in 1887. His father Henry Nottidge Moseley (1844–1891), who died when Moseley was quite young, was a biologist and also a professor of anatomy and physiology at the University of Oxford, who had been a member of the Challenger Expedition.
Photographic recording of Kα and Kβ X-ray emission lines for a range of elements. Moseley's law is an empirical law concerning the characteristic X-rays emitted by atoms.The law has been discovered and published by the English physicist Henry Moseley in 1913–1914.
In 1913, Henry Moseley measured the X-ray emissions of all the elements on the periodic table and found that the frequency of the X-ray emissions was a mathematical function of the element's atomic number and the charge of a hydrogen nucleus (see Moseley's law). [citation needed]
Early 20th century chemist Henry Moseley speculated that the answer to the number of protons lay in the nucleus. By firing a radioactive source at copper, he was able to knock electrons from their atoms, releasing a burst of energy in the form of an x-ray. When measured, the x-rays always had the same energy, unique to copper.
The early theory of atomism can be traced back to ancient Greece. Greek atomism was made popular by the Greek philosopher Democritus, who declared that matter is composed of indivisible and indestructible particles called "atomos" around 380 BC. Earlier, Leucippus also declared that atoms were the most indivisible part of matter.
Henry Moseley (9 July 1801 – 20 January 1872) was an English churchman, ... Syllabus of a Course of Experimental Lectures on the Theory of Equilibrium, London, 1831.
Moseley was part of Rutherford's group, as was Niels Bohr. Moseley measured the frequencies of X-rays emitted by every element between calcium and zinc and found that the frequencies became greater as the elements got heavier. This led to the theory that electrons were emitting X-rays when they were shifted to lower shells. [11]
Moseley was born in Wandsworth, London, the son of Henry Moseley. He was educated at Harrow School, at Exeter College, Oxford (Arts) [2] and at the University of London (medicine). He married Amabel Gwyn Jeffreys, daughter of the conchologist John Gwyn Jeffreys, in 1881, and they were the parents of the noted British physicist Henry Gwyn ...