what was his role towards explaining the atomic structure?
His discovery showed that atomic numbers were not arbitrarily assigned, but rather, they have a definite physical basis.
Henry Moseley
Moseley's discovery showed that atomic numbers were not arbitrarily assigned, but rather, they have a definite physical basis.
what is the purest form of iron called UNANSWERABLE what is this subsance? It is a chemical element with symbol Fe and atomic number 26. what is this number? Also known as the proton number (symbol "Z") of a chemical element - it is the number of protons found in the nucleus of every atom of that element. how is it related to an experiment conducted in 1913? The experimental position improved dramatically after research by Henry Moseley in 1913. who was this person? He 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. where was he from? Weymouth in Dorset
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Henry Moseley [SEP] Contribution to understanding of the atom
Before Moseley and his law, atomic numbers had been thought of as a semi-arbitrary ordering number, vaguely increasing with atomic weight but not strictly defined by it. 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. Moseley redefined the idea of atomic numbers from its previous status as an "ad hoc" numerical tag to help sorting the elements into an exact sequence of ascending atomic numbers that made the Periodic Table exact. (This was later to be the basis of the Aufbau principle in atomic studies.) As noted by Bohr, Moseley's law provided a reasonably complete experimental set of data that supported the (new from 1911) conception by Ernest Rutherford and Antonius van den Broek of the atom, with a positively charged nucleus surrounded by negatively charged electrons in which the atomic number is understood to be the exact physical number of positive charges (later discovered and called protons) in the central atomic nuclei of the elements.