atomic scattering

Structure of the Atom - Summary Atom is the smallest particle of an element, which maintains its identity throughout chemical and physical changes. Atoms are made up of three fundamental particles: electrons, protons and neutrons. Discharge tube experiments by William ..

. In it, he pictured a sphere of positive charges mixed together with an equal number of electrons. For his theoretical and experimental investigations into the electron and the conduction of electricity by gases he was awarded the 1906 Noble prize in Physics. He and his student Rutherford were the..

Conclusion - Rutherford's alpha particle scattering experiment explained the structure of atom and the size of nucleus. The Bohr's model explained the hydrogen spectrum. Radioactivity occurs due to nuclei being unstable resulting in the emission of three types of radiations havi..

Summary - Dalton had postulated that matter is made up of atoms, which are indivisible. Thomson was the first to suggest a structure for an atom. According to him, an atom is a positively charged sphere of radius=10 - 1 0 m in which the mass and the positive charge of ..

Rutherford's Atom Model (Main Features) - (i) Every atom consists of a nucleus containing the entire +ve charge. The whole mass of atom is concentrated at this core. (ii) The size of the nucleus i.e., 10 - 1 5 m is very small compared to the size of the atom ..

Rutherford's alpha particle scattering experiment explained the structure of atom and the size of nucleu..

Pictorial representation of the a particles through different angles. A radioactive source S emitting a particles was collimated into a fine beam and made to fall on a thin gold foil. The a particles scattered in all directions. These produced bright flashes on falling on the f..

Since most of the alpha particles pass straight through the gold foil without any deflection it shows there is a lot of empty space in an atom Some of the alpha particles are deflected through small and large angles, which shows that there is a 'centre of positive charge' in an atomh..

Rutherford and his co-workers, performed series of scattering experiments and concluded that the entire mass and the positive charge is concentrated in a very small region at the centre of the atom, known as nucleus. The radius of the nucleus is about 10 - 1 5 m i.e., 10..

These observations explained that there was a coulomb interaction between a particles and electron. As a particles were 7000 times more massive than electrons, a strong force is needed to deflect them through large angles. Therefore the entire +ve charge of the gold foil was concentrated at th..