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Dalton Model
Dalton imagined that atoms were like tiny, solid balls, like miniature pool balls. He believed that atoms are what made up elements, and that the difference between elements was the size of the atoms. -
Thomson Model
J,J. Thomson, a British scientist, is the scientist who discovered electrons. The model that he created of an atom was like Daltons, of a sphere, but it was covered negatively charged electons which were embedded in it. The would be described sort of by looking like a muffin with scattered raisions and berries on it's surface. He also believed that atoms were positively charged. -
Nagaoka Model
Hantaro Nagaoka was a Japanese physicist. Nagaoka believed that an atom had a large sphere in the center of it that charged positive energy. A way to describe his model would be of electrons revolving around the sphere in the middle like the planets around the sun. -
Rutherford Model
Ernest Rutherford was a British physicist. Rutherford came to the conclusion that an atom is mad mostly of empty space. He also concluded that randomly orbiting around a small, positively charged nucleous, were electrons. -
Bohr Model
Another model was proposed by a Danish physicist by the name of Niels Bohr. His model was similar to Rutherford's but instead of orbitting randomly around, the electrons were moving in specifice layers. He said that when the electrons moved from one layer to another, they gave off energy. -
Chadwick Model
The neutron was discovered by James Chadwick, a British physicist. HIs discovery of the neutrons gave explanation as to why atoms were heavier than the total mass of their protons and electrons -
Present Model
Our current idea of what an atom is, is deteremined from work done from the 1920s, to now. Our belief is that around the nucleous is a negatively charged 'cloud' formed by electrons. As of now, we cannot determine an exact position of where an atom is at a given time.
