History of the Atom Digital Project

By: Equayla Smith and Alexus Brigham

Henry Moseley

Random Facts

  • Henry Gwyn Jeffreys Moseley was an English Physicist
  • Born on November 23, 1887 in Weymouth, Dorset, United Kingdom
  • Graduated from Trinity College of the University of Oxford
  • When World War I broke out in Europe, he left his research work at the University behind to volunteer for the Royal Engineers of the British Army
  • He was shot and killed during the Battle of Gallipoli on August 10, 1915 at the age of 27

Discovery Facts

Henry Moseley arranged chemical elements in the order of their atomic numbers on the periodic table. Henry's outstanding contribution was the justification from physical laws of the previous empirical and chemical concept to the atomic number. His law justified many concepts in chemistry by sorting the elements of the periodic table of the elements in a quite logical order based in their physics. Henry Moseley discovered that the atomic number gives the number of protons in the nucleus. He found that certain lines in the x-ray spectrum of each element moved the same amount each time you increased the atomic number by one.

  • Predicted the undiscovered element Hafnium on December 7, 1910
  • Discovered that Lanthanide must have 15 members
  • Discovered the element Rhenium on October 21, 1913


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