History of the development of atomic structure theory. 5

The history of the development of the atomic structure model is:First, at the beginning of the 19th century, the British scientist Dalton.

He proposed the modern atomic theory, which he believed that atoms are tiny, indivisible solid spheres.

Second, in 1911 British physicist Rutherford.

Thomson's student) proposed a model of the structure of an atom with a nucleus.

Third, in 1897, the British scientist Thomson discovered the electron, and in 1904, he proposed a "raisin bread-style" atomic structure model.

Fourth, Austria.

Physicist Schrödinger proposed the electron cloud model (probability theory), which is the modern quantum mechanics.

Atomic model. V. Denmark in 1913.

Physicist Bohr (a student of Rutherford) introduced quantum theory.

point of view, a model of the atomic structure of the movement of electrons in a certain orbit is proposed.

Theory of the atomic structure model:1.Atoms are particles that cannot be divided.

2.Atoms of the same element are the same in various properties and masses.

3.Atoms are tiny solid spheres.

The development of atomic structure model refers to the process of discovering and proposing new atomic structure models from the first atomic structure model proposed by Dalton in 1803.

Dalton's model (1803) The atom is a hard, solid ball, British natural scientist John Dalton.

The world's first atom was proposed.

Theory:

Atoms are particles that cannot be divided.

Atoms of the same element are the same in various properties and masses.

Atoms are tiny solid spheres.

Although it was proved that this was a failed theoretical model, Dalton brought the atom from philosophy to the study of chemistry for the first time, and clarified the direction of future chemists, and chemistry really began to move from ancient alchemy.

Dalton was also hailed as the "father of modern chemistry" by later generations.

From the British chemist and physicist Dalton.

After the creation of the atomic theory, for a long time, it was believed that the atom was like a solid ball of glass that could not be smaller, and there were no more tricks in it.

Since 1869 the German scientist Hitoff discovered cathode rays.

Later, Crookes, Hertz.

Lerner, Thomson.

A large number of scientists have studied cathode rays for more than 20 years.

Eventually, Thomson.

The presence of electrons was discovered. Normally, atoms are not charged, since negative electrons can run out of atoms that are 1700 times smaller than their mass, which indicates that there is a structure inside the atom, and it also means that there are positively charged things in the atom, and they should be neutralized with the negative charge carried by the electrons, so that the atom is neutral.