difference between the models of jj Thomson Rutherford and Bohr
Answers
Since Ancient Greece, scientists have proposed the existence of the atom, but understandings of atomic structures changed rapidly at the turn of the 20th century. This began with J.J. Thomson's 1904 proposal of the plum pudding model, which allowed for an atom of positively charged soup with negative electrons floating throughout. Within less than a decade, scientists Ernest Rutherford and Niels Bohr began to question the model and created the planetary model instead.
Thomson's Plum Pudding Model
In 1904, Thomson proposed the plum pudding model of the atom. The model was named after the consistency of plum pudding with raisins floating throughout. The pudding represented a positively charged filling in which negatively charged electron "raisins" floated. According to the model, the filling was roughly the same consistency everywhere in an atom. Thomson was awarded the Nobel Prize for his theory, and the plum pudding model remained the dominant theory of the atom until around 1908, when it was superseded by the planetary model.
Rutherford's Planetary Model
In 1908, Thomson's former student, Rutherford, proposed that the plum pudding model was incorrect, because each atom contained a central nucleus. To test his thesis, Rutherford shot alpha rays at a sheet of gold only 1/3000 inch thick. If Thomson's model were correct, every alpha ray would shoot through the sheet of metal because the ray would simply pass through the atom's "pudding." However, Rutherford noticed that some rays shot back. This implied that they bounced off something solid, which Rutherford thought was a central nucleus. He thus added this component to Thomson's model, which had no central nucleus.
I hope this helps you.
Answer:
J.J. Thomson, Ernest Rutherford and Niels Bohr contributed for atomic theory.
Explanation:
The difference in the atomic theroy given by three scientist J.J. Thomson, Rutherford and Bohr is that they discovered three different important components of atom.
JJ Thomson discovered the electron in 1897 using the cathode ray tube, which identified electron with negative charge.
Rutherford discovered the nucleus in 1911. He used a gold foil sheet and direct a positively charged alpha particles at it and observed their paths using a detecting screen and called Gold Foil Experiment.
Niels Bohr gave Bohr model states that electrons are in orbits outside the nucleus in 1913 by observing the electrified light given off by hydrogen atoms.
Learn more about atomic theory:
https://brainly.in/question/6553168
https://brainly.in/question/17138631