In 1925, wolfgang pauli introduced two new numbers and formulated the pauli principle, which proposed that no two electrons in an atom could have identical sets of quantum numbers. Pauli's particle was named the neutrino by fermi in 1934 and at that time he correctly stated that it was not a constituent of the nucleus of an atom. It was later found experimentally.

Wolfgang ernst pauli was an austrian theoretical physicist who pioneered the study of quantum physics and is most famous for the pauli exclusion principle.