The 'plum pudding' model of the atom was proposed by JJ Thomson, who had also discovered the electron. It was put forth before the discovery of the nucleus. According to this model, the atom is a ...

At the beginning of the 20th century, J.J. Thompson suggested the "plum pudding" model of the atom, a mass of positive matter with little "plums" of negative electrons scattered throughout.

A historic model It is 100 years since Niels Bohr developed the model of the atom that paved the way for many other inventions such as the transistor and the Laser ...

17 24059 A Plum Pudding Model Of The Atom 18 24589 A Discovery Of The Nucleus 19 28993 A Circular Planetary And Atomic Orbits 20 30338 A Ultraviolet Catastrophe 21 31408 H Downfall Of The Rutherford ...

Picture an atom, and you may imagine spherical electrons orbiting a nucleus packed with particles like neutrons. Only certain orbits - quantum levels - are possible. It's a simplistic model, yet ...