**ATOM-** In chemistry lessons, atoms also have several types of models. Wow, how many models are there? Curious? let’s just explore 5 types of atomic models!

As previously mentioned, there are 5 atomic models, including Squad. How come there are 5, huh? You can! The atomic model has developed over time. Starting from the simplest to the most sophisticated as it is today. Let’s start getting to know each other, shall we?

## Dalton’s Atomic Model

The simplest atomic model is the Dalton atomic model, proposed by John Dalton, a British scientist. According to this model of the atom, the atom is a solid sphere with no charge. In addition, according to this atomic theory, the atom is the smallest unit that cannot be subdivided. Different chemical elements will have different types of atoms.

## Thompson’s Atomic Model

The second atomic model is the Thompson atomic model. As the name implies, Joseph John Thompson discovered this atomic model. Then, the shape of the Thompson atomic model is like a raisin bun. That’s because an atom is a solid sphere with a positive charge with negative particles (electrons) scattered around it. Moreover, the sum of the positive and negative charges on the atom is the same. Thomson proved this atomic model research using cathode tube rays.

## Rutherford Atomic Model

In 1911 Ernest Rutherford proposed Rutherford’s atomic model. Then, in this atomic theory, each atom contains a positively charged atomic nucleus with electrons circling in its orbit. In addition, this atomic mass focuses on the atomic nucleus, and most of the atom’s volume is empty space, you know. Then, the experimental results of shooting metal with alpha rays prove this, This experiment is Geiger-Marsden.

## Bohr Atomic Model

In 1913 Niels Bohr and Ernest Rutherford came up with the Bohr model of the atom. Then, in the atomic model, Bohr stated that the atom consists of an atomic nucleus containing protons and neutrons, and electrons that revolve around them in their orbits (certain energy levels). ) ). This orbit is the shell of the atom. Wow, so like the orbits of the planets in the solar system, huh!

## Quantum Mechanics Atomic Model

The quantum mechanical atomic model is the most modern atomic model. So, Atoms consist of a positively charged atomic nucleus and a cloud of electrons that surrounds them. The area where electrons are found is orbitals. According to this theory, there are four types of orbitals, namely s, p, d, and f.