Discovery of Neutrons
Discovery of Neutrons
Discovery of Neutron : The helium atom has 2 electrons and 2 protons. So, the mass of the helium atom was expected to be twice the mass of the hydrogen atom, which has 1 electron and 1 proton. But, actually the mass of the helium atom is four times that of the hydrogen atom. It was found that atoms of all the elements (except hydrogen) were at least twice as heavy as could be explained by the number of protons they had. To explain this it was predicted that other particles with no charge, but mass equal to that of a proton, must be present in all atoms except hydrogen. This prediction was proved to be correct with the discovery of the neutron.
In 1932, James Chadwick bombarded the element beryllium with alpha-particles. He observed the emission of a radiation with the following properties.
Who discovered Neutron? | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following elements bombarded with alpha particles by James Chadwick, during the discovery of neutron? | |||
| Right Option : B | |||
| View Explanation | |||
Which of the following statement / statements are correct : (a) Neutron was discovered by James Chadwick (b) Neutron mass is -1.67 X 10-27 kg. (c) Neutrons are the sub atomic particles. (d) "N" is used to represent the term Neutron. | |||
| Right Option : B | |||
| View Explanation | |||
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