Question

Describe the Rutherford model of atom and its drawbane?​

Answer 1

Answer:

The Rutherford model was devised by Ernest Rutherford to describe an atom. Rutherford directed the Geiger–Marsden experiment in 1909 which suggested, upon Rutherford's 1911 analysis, that J. J. Thomson's plum pudding model of the atom was incorrect. Rutherford's new model[1] for the atom, based on the experimental results, contained new features of a relatively high central charge concentrated into a very small volume in comparison to the rest of the atom and with this central volume also containing the bulk of the atomic mass of the atom. This region would be known as the "nucleus" of the atom

Answer 2

Rutherford's Model Of Atom: In 1911, Rutherford performed scattering experiment through which he was able to propose the model of atom which is known as Rutherford's nuclear model of atom.

Experiment: First of all Rutherford bombarded a thin foil of metal as Gold nearly 100mm thick, with a beam of fast moving alfa α-particles. The source of alfa particle was Radium, which is a radioactive substance and it was kept in a lead block in which slits were used to get fine beam of α-particles.

The gold foil was plated with Zinc sulphide screen so that when the α-particles strike over it at any place a light flash is given out.

Observation: On the basis of above experiments he found the following observtion:

• Most of the α-particles passed foil without deflecting
• A few were deflected through small angles. and,
• very few wer revert back through an angle greater than 90 degree.

Statement: On the basis of above observation he got the following conclusions which were called as model of atom.

• Since most of α-particles passed without deflection hence, the atom must have empty space inside.
• as some α-particles were deflected throgu small angles, so there must be some positive charge inside the atom which deflected the positively charged α-particles.
• since some α-particles were deflected back it means they must got striked to some heavy particles. these heavy particles were called as NUCLEUS.