Month → April

24
Apr

April 24, 1968 - Death of Elizaveta Karamichailova, a pioneer of early 20th-century nuclear physics

25
Apr

April 25, 1900 – Birth of Wolfgang Pauli, Nobel Prize for the Exclusion Principle, proposing a fourth quantum number and theorising about the neutrino

27
Apr

April 27, 1970 - Dubnium, element 105 on the periodic table, was discovered

29
Apr

April 29, 1894 – Birth of Marietta Blau, identified traces of atomic particles that allowed protons to be distinguished from alpha particles

29
Apr

April 29, 1983 - Birth of Harold Clayton Urey, pioneer in working with isotopes

30
Apr

April 30, 1897 - Joseph J. Thomson discovered the electron

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