McqMate
| Q. |
Nucleus of an atom consists of. |
| A. | Proton |
| B. | Neutron |
| C. | Proton and Neutron |
| D. | Electron, Proton and Neutron |
| Answer» C. Proton and Neutron | |
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Explanation: The nucleus is the very dense region consisting of protons and neutrons at the center of an atom. It was discovered in 1911, as a result of Ernest Rutherford's interpretation of the famous 1909 Rutherford experiment performed by Hans Geiger and Ernest Marsden, under the direction of Rutherford. The proton- neutron model of nucleus was proposed by Dmitry Ivanenko in 1932. Almost all of the mass of an atom is located in the nucleus, with a very small contribution from the orbiting electrons. |
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