Tang Musun.

jujube cake model is a hypothesis about atomic structure put forward by Tang Musun in 1898, so it is also called Thomson model.

It is considered that atoms are spheres, positively charged substances are uniformly distributed in the sphere, and negatively charged electrons are embedded in concentric rings everywhere in the sphere. Five electrons can be put in the first ring, and ten can be put in the second ring ... The total amount of positive and negative charges in atoms is equal.

Although this model was later replaced by Rutherford's nuclear atom model, it was the beginning of establishing the atomic structure model.

Extended information:

Tang Musun's paper was published in the March 194 issue of Philosophy Magazine, which was the most authoritative British scientific journal at that time. Tang Musun stated:

When the atom is in the lowest energy state, the electron is stationary in the equilibrium position. When the atom is excited to a high energy state, the electron makes a simple harmonic vibration at the equilibrium position and emits electromagnetic radiation.

Thomson model has achieved some success in explaining the periodicity of elements, and it can also qualitatively explain the optical radiation of atoms. For example, for hydrogen atoms, according to Tang Musun atomic model, there may be an optical radiation with a far ultraviolet frequency, but it cannot explain a large number of hydrogen atomic spectra with different frequencies observed in experiments.

Although the Thomson model was rejected by a series of experiments on the scattering of α particles by atoms in 1911, the ideas of "concentric ring" and "only a limited number of electrons can be placed on the ring" are still valuable.

Baidu encyclopedia-Tang Musun