Repeated Questions from PSC examinations (Inventions)
- Proton : Ernest Rutherford
- Neutron : James Chadwick
- Electron : J. J. Thomson
- Introducing the atomic theory : John Dalton
- Who discovered nuclear fission in 1938 : Otto Hahn
- Quantum Theory : Max Planck
- Radioactivity : Henri Becquerel
- the theory of relativity : Albert Einstein
- rabies Vaccine : Louis Pasteur
- Hydrogen : Henry Cavendish
- Oxygen : Joseph Priestley (1772)
- Nitrogen : Daniel Rutherford
- Carbon : Antoine Lavoisier
- Sodium : Humphry Davy
- Potassium : Humphry Davy
- Chlorine : Carl Wilhelm Scheele
- Thermometer : Galileo Galilei
- Radium : Marie Sklodowska-Curie and her husband Pierre Curie on 21 December 1898
- Penicillin : Alexander Fleming
- Electricity : Benjamin Franklin
