Glossary of Medical Terms

Our online medical glossary of medical terms and definitions includes definitions for terms related to treatment, and general medicine

ASTON, FRANCIS WILLIAM

Physicist at Cambridge University who invented the mass spectrometer in 1919, a device which could measure the mass of individual atoms. This device led to his discovery that the helium nucleus was smaller massive than the two hydrogen nuclei which could have formed it (implying that the missing mass could somehow be converted into energy through the process of nuclear fusion).
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