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Dalton - Solid Sphere Model
Dalton hypothesized that an atom is a solid sphere that couldn't be divided into smaller particles. He came to conclusion that a certain gases only combined in specific proportions. Also that atoms are indestructible and retain their identities in chemical reactions. -
Thomson - The Plum Pudding Model
Thomson proposed the plum pudding model before the discovery of the atomic nucleus in order to include the electron in the model. According to Thomson's model, the atom is a sphere of positive charge and negative charged electrons. With both together it helped it to balance the positive charge in it. -
Rutherford - The Nuclear Model
He overturned Thomson's model with his well known gold foil experiment. Where he demonstrated that a atom had a tiny and heavy nucleus. Rutherford came up with a design to use the alpha particles that emitted by a radioactive element to the unseen world of the atomic structure. -
Bohr - The Bohr (Planetary) Model
Bohr was the first to discover that electrons travel in separate orbits around the nucleus. Also that the number of electrons that are in the outer orbit determine the properties of a element. He expanded Rutherford's ideas and focused his attention to describe the electron. He based his observation of the atomic emission spectrum of the hydrogen atom. Bohr had found out that the closer an electron was to the nucleus the less energy it need, but the farther away it is the more energy it need. -
Schrodinger - Quantum Mechanics model
Schrodinger discovered that electrons do not move in orbits. He made a theory that they moved in waves and that they do not have a exact location. He used mathematical equations to describe the likelihood of finding an electron in a certain position. Schrodinger's model wasn't like Bohr's model his didn't define the exact path of the electron. The quantum can be portrayed as a nucleus surrounded by an electron cloud.