| Achievement | Name |
|---|
| Introduced concept of 'triads' of elements | |
| Greek philosopher who created word 'Atomos' | |
| Credited with discovery of periodic table/organized elements by increasing atomic mass | |
| Organized elements by increasing atomic number; periodic law | |
| Greek philosopher who refuted atomic theory | |
| Modern formulator of atomic theory | |
| Discovered the cathode ray | |
| | Achievement | Name |
|---|
| Plum pudding model | |
| Gold foil experiment | |
| Uncertainty principle (Fundamentally impossible to know precisely both the velocity and position of a particle at the same time) | |
| Wave equation (Treated the hydrogen atom's electron as a wave) | |
| Exclusion principle (Only two electrons with opposite spins can occupy a single atomic orbital) | |
| Related electron arrangement in atoms and atomic chemical properties | |
|
Periodic Table
Planets from the Sun
Digits of Pi
