Electrons, protons, and neutrons are the three subatomic particles. What are the features of subatomic particles?Īns: A subatomic particle is one that is smaller than an atom and is invisible to the human eye. They are important because they are the building block of matter.
Why are the subatomic particles important?Īns:There are three subatomic particles-electrons, protons and neutrons. Chadwick in \(1932\) discovered neutrons. In \(1909,\) Ernest Rutherford discovered protons in his gold foil experiment. The first subatomic particle electron was discovered in \(1897\) by J.J Thomson. The mass of each of the three subatomic particles is different.Īns: The discovery of subatomic particles were done as follows. Protons are positively charged particles, electrons are negatively charged particles, and neutrons are electrically neutral particles, meaning they have no charge. Give the difference between three subatomic particles.Īns: Protons, electrons, and neutrons are the three subatomic particles that make up an atom. Name the three subatomic particles of an atom. They are microscopic material particles that cause mechanical effects.įrequently asked questions related to discovery of subatomic particles is listed as follows:.When these rays collide with a metallic foil, they produce a heating effect.When these rays are placed in an electric field, they are deflected by a positive field and attracted by a negative field.They begin at the anode and work their way to the cathode.The observations of the anode ray experiment are as follows. Since the positive charge on a proton is exactly equal in magnitude to the negative charge of an electron, a neutral atom possesses the same number of protons as is the number of electrons present in it. Hence, it was thought that protons are subatomic particles and are present in all atoms. Protons were also obtained in various nuclear reactions. Determination of the mass of these particles revealed that the mass of one particle was \(1837\) times the mass of an electron. When a beam of cathode rays strikes a hard metallic object like tungsten, \(\) for the constituent particles of hydrogen gas was found to be maximum. When placed in an electric field, they are inflected by a positive field and deflected by a negative field, and travel in a straight line in the absence of electrical or magnetic fields. On a soda glass screen put in the tube, they produce a greenish-yellow glow. Phosphorescent materials are the only way to see these rays. Cathode rays originate at the cathode and move towards the anode. The observations of the cathode ray experiment are as follows. Thomson repeated his experiments with several metals as electrode materials and discovered that the characteristics of the cathode ray were constant regardless of the cathode material they originated from. Thomson was able to determine the mass-to-charge ratio of cathode ray particles as a result of these studies, which led to a remarkable discovery: each particle’s mass was much, much lower than that of any known atom. Thomson also placed two magnets on either side of the tube and observed that the cathode ray was diverted by the magnetic field. This indicated that the cathode ray was made up of negatively charged particles. The cathode ray was redirected from the negatively charged electric plate to the positively charged plate. Thomson placed two oppositely charged electric plates around the cathode ray to examine its characteristics.
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