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L7 : Neutron discovery - Structure of Atom, Class 11 Video Lecture

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FAQs on L7 : Neutron discovery - Structure of Atom, Class 11 Video Lecture

1. What is the structure of an atom?
Ans. The structure of an atom consists of a dense central nucleus made up of positively charged protons and uncharged neutrons. Electrons, which carry a negative charge, orbit around the nucleus in specific energy levels or shells.
2. How was the neutron discovered?
Ans. The neutron was discovered by James Chadwick in 1932. He conducted experiments where he bombarded beryllium with alpha particles, which resulted in the emission of a previously unknown radiation. Chadwick showed that this radiation was composed of neutral particles, which he named neutrons.
3. What is the role of neutrons in the structure of an atom?
Ans. Neutrons play a vital role in the structure of an atom. They are located in the nucleus alongside protons and provide stability to the atom. Neutrons help to balance the positive charge of protons, preventing them from repelling each other. The number of neutrons also determines the isotope of an element.
4. Why are neutrons uncharged?
Ans. Neutrons are uncharged because they do not possess any electrical charge. They are composed of three quarks—two down quarks and one up quark. The combination of these quarks in the neutron's structure results in a neutral overall charge.
5. How does the discovery of the neutron impact our understanding of atomic structure?
Ans. The discovery of the neutron significantly impacted our understanding of atomic structure. Prior to its discovery, it was believed that the nucleus of an atom only contained protons. The presence of neutrons in the nucleus explained why atoms with the same number of protons could have different masses. The neutron also contributed to the development of nuclear energy and the understanding of nuclear reactions.
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