Atom & Nuclei PDF Past Paper (Page 1)

PHYSICS ATOM & NUCLEI +2 SCIENCE The first model of atom was proposed by J.J Thomson in 1898 called plum pudding model of the atom. Later, Rutherford worked on it and named this model as Rutherford's planetary model of atom in 1911. In 1913, Niels Bohr worked...

PHYSICS ATOM & NUCLEI +2 SCIENCE The first model of atom was proposed by J.J Thomson in 1898 called plum pudding model of the atom. Later, Rutherford worked on it and named this model as Rutherford's planetary model of atom in 1911. In 1913, Niels Bohr worked on the model named as Bohr model of H-atom. ∝-Particles Scattering Experiment By Rutherford This experiment was suggested by Rutherford in 1911 as given in the figure below In this experiment, H.Geiger and E.Marsden took 83 Bi as a source for a-particles. A collimated 214 beam of 83 a-particles of energy 5.5 MeV was allowed to fall on 2.1 x 10-7 m thick gold foil. The ∝-particles were observed through a rotatable detector consisting of a zinc sulphide screen and microscope and it was found that a-particles got scattered. These scattered ∝-particles produced bright flashes or scintillations on the zinc sulphide screen. Now, these scintillations were counted at different angles from the direction of incident beam. VIKASH TUTORIAL, KHALLIKOTE, GANJAM Page 1 PHYSICS ATOM & NUCLEI +2 SCIENCE VIKASH TUTORIAL, KHALLIKOTE, GANJAM Page 2 PHYSICS ATOM & NUCLEI +2 SCIENCE VIKASH TUTORIAL, KHALLIKOTE, GANJAM Page 3 PHYSICS ATOM & NUCLEI +2 SCIENCE VIKASH TUTORIAL, KHALLIKOTE, GANJAM Page 4 PHYSICS ATOM & NUCLEI +2 SCIENCE VIKASH TUTORIAL, KHALLIKOTE, GANJAM Page 5 PHYSICS ATOM & NUCLEI +2 SCIENCE VIKASH TUTORIAL, KHALLIKOTE, GANJAM Page 6 PHYSICS ATOM & NUCLEI +2 SCIENCE VIKASH TUTORIAL, KHALLIKOTE, GANJAM Page 7 PHYSICS ATOM & NUCLEI +2 SCIENCE VIKASH TUTORIAL, KHALLIKOTE, GANJAM Page 8 PHYSICS ATOM & NUCLEI +2 SCIENCE VIKASH TUTORIAL, KHALLIKOTE, GANJAM Page 9 PHYSICS ATOM & NUCLEI +2 SCIENCE VIKASH TUTORIAL, KHALLIKOTE, GANJAM Page 10 PHYSICS ATOM & NUCLEI +2 SCIENCE VIKASH TUTORIAL, KHALLIKOTE, GANJAM Page 11 PHYSICS ATOM & NUCLEI +2 SCIENCE VIKASH TUTORIAL, KHALLIKOTE, GANJAM Page 12 PHYSICS ATOM & NUCLEI +2 SCIENCE VIKASH TUTORIAL, KHALLIKOTE, GANJAM Page 13 PHYSICS ATOM & NUCLEI +2 SCIENCE VIKASH TUTORIAL, KHALLIKOTE, GANJAM Page 14 PHYSICS ATOM & NUCLEI +2 SCIENCE VIKASH TUTORIAL, KHALLIKOTE, GANJAM Page 15 PHYSICS ATOM & NUCLEI +2 SCIENCE VIKASH TUTORIAL, KHALLIKOTE, GANJAM Page 16 PHYSICS ATOM & NUCLEI +2 SCIENCE VIKASH TUTORIAL, KHALLIKOTE, GANJAM Page 17 PHYSICS ATOM & NUCLEI +2 SCIENCE *** VIKASH TUTORIAL, KHALLIKOTE, GANJAM Page 18