where was he born?
Weymouth, Dorset in England
Henry Moseley
Henry G. J. Moseley, known to his friends as Harry, was born in Weymouth in Dorset in 1887. 
a medium of free floating positive and negative charges is called a(n) Plasma what can you tell me about the physical properties of electron? The electric charge is negative one elementary charge; its mass is approximately 1/1836 that of the proton; exhibit properties of both particles and waves: they can collide with other particles and can be diffracted like light. where can you see its use? In the electron microscope; free-electron laser (FEL); cathode ray tubes; in welding;  Electron beam processing is used to irradiate materials in order to change their physical properties or sterilize medical and food products. were there any theories based on it? Yes - experiments by physicists Ernest Rutherford, Henry Moseley, James Franck and Gustav Hertz had largely established the structure of an atom as a dense nucleus of positive charge surrounded by lower-mass electrons. can you elaborate on the initial physicist's theory? He formulated the Rutherford model of the atom in 1911 that a very small charged nucleus, containing much of the atom's mass, was orbited by low-mass electrons. when was this formulated? 1911 what can you tell me about the second physicist? His contribution to physics was the justification from physical laws of the previous empirical and chemical concept of the atomic number. This stemmed from his development of Moseley's law in X-ray spectra. what was his contribution on the study of atom? Moseley's discovery showed that atomic numbers were not arbitrarily assigned, but rather, they have a definite physical basis. Moseley postulated that each successive element has a nuclear charge exactly one unit greater than its predecessor.
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Henry Moseley [SEP] Biography
Henry G. J. Moseley, known to his friends as Harry, 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. Moseley's mother was Amabel Gwyn Jeffreys, the daughter of the Welsh biologist and conchologist John Gwyn Jeffreys. She was also the British women's champion of chess in 1913. Moseley had been a very promising schoolboy at Summer Fields School (where one of the four "leagues" is named after him), and he was awarded a King's scholarship to attend Eton College.