Henry Moseley and The Proton

1. Henry Moseley and The Proton Isabella Bucci and Natalie Crane

2. Biography • Born on November 23, 1887 • Born in Weymouth, Dorset, United Kingdom • Family had a scientific background • Went to Eton College

3. Biography • In 1910, graduated from Trinity College of the University of Oxford. After he earned a position in the laboratory of Ernest Rutherford at the University of Manchester. • Died in the Battle of Gallipoli in 1915

4. Achievements • Through observations and measurements of the x-ray spectra of various of chemical elements obtained by diffraction in crystals, he discovered a systematic relation between wavelength and atomic number; known as Moseley’s Law.

5. Achievements • He predicted a number of missing elements and their periodic numbers in the periodic table • His method in x-ray crystallography sorted out many chemical problems scientists couldn’t previously solve

6. Rutherford and Moseley • He was apart of Rutherford’s research group • Moseley arrived in Manchester weeks before Rutherford published his nucleus paper when he started working on his atomic number work • Rutherford did not support the idea of Moseley studying x-rays but he liked Moseley enthusiasm and let him do it

7. The Neutron • Rutherford didn’t propose the existence of the neutral particle until 1920; the neutron • James Chadwick, another of Rutherford’s students, discovered the neutron in 1932 and won the Nobel Peace Prize in 1935 for his findings

8. Developmoent of the Atomic Theory • In 1913, he proposed the idea of the relationship was a function of the positive charge on the nucleus. • He rearranged the periodic table by using the atomic number instead of atomic mass to represent the progression of elements.