{"id":89959,"date":"2025-06-01T10:17:58","date_gmt":"2025-06-01T10:17:58","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=89959"},"modified":"2025-06-01T10:17:58","modified_gmt":"2025-06-01T10:17:58","slug":"in-a-radioactive-decay-of-a-nucleus-an-electron-is-also-emitted-this","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/in-a-radioactive-decay-of-a-nucleus-an-electron-is-also-emitted-this\/","title":{"rendered":"In a radioactive decay of a nucleus, an electron is also emitted. This"},"content":{"rendered":"

In a radioactive decay of a nucleus, an electron is also emitted. This may happen due to the fact that :<\/p>\n

[amp_mcq option1=”electrons are present inside a nucleus” option2=”an electron is created at the time of conversion of a neutron into proton” option3=”an electron is created at the time of conversion of a proton into a neutron” option4=”electrons need to be emitted for conservation of momentum” correct=”option2″]<\/p>\n

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UPSC CAPF – 2015<\/div>\n<\/div>\n
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\nIn radioactive beta minus (\u03b2\u207b) decay, an electron is emitted because a neutron is converted into a proton within the nucleus.
\n<\/section>\n
\nBeta minus (\u03b2\u207b) decay is a type of radioactive decay in which a neutron (n) within an atomic nucleus is converted into a proton (p). In this process, an electron (e\u207b) and an electron antineutrino (\u03bd\u0304e) are emitted from the nucleus. The reaction is typically written as: n \u2192 p + e\u207b + \u03bd\u0304e. The electron is not pre-existing within the nucleus; it is created during this transformation. The atomic number of the nucleus increases by one, while the mass number remains unchanged.
\n<\/section>\n
\nElectrons are fundamental particles and are not constituents of the nucleus; protons and neutrons are the nucleons. The electron emitted in beta decay originates from the conversion of a neutron. Another type of beta decay is beta plus (\u03b2\u207a) decay, where a proton converts into a neutron, emitting a positron (e\u207a) and an electron neutrino (\u03bde): p \u2192 n + e\u207a + \u03bde. Electron capture is an alternative process where an electron from an inner atomic shell is captured by a proton in the nucleus, leading to the conversion of a proton into a neutron and emission of a neutrino. Momentum and energy conservation rules are followed in all radioactive decay processes, and the emission of the neutrino\/antineutrino is necessary for conserving energy, momentum, and angular momentum, but the *reason* for electron emission in \u03b2\u207b decay is the fundamental weak interaction process of neutron decay.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

In a radioactive decay of a nucleus, an electron is also emitted. This may happen due to the fact that : [amp_mcq option1=”electrons are present inside a nucleus” option2=”an electron is created at the time of conversion of a neutron into proton” option3=”an electron is created at the time of conversion of a proton into … <\/p>\n

Detailed SolutionIn a radioactive decay of a nucleus, an electron is also emitted. This<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1085],"tags":[1443,1203,1128],"class_list":["post-89959","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1443","tag-nuclear-physics","tag-physics","no-featured-image-padding"],"yoast_head":"\nIn a radioactive decay of a nucleus, an electron is also emitted. This<\/title>\n<meta name=\"description\" content=\"In radioactive beta minus (\u03b2\u207b) decay, an electron is emitted because a neutron is converted into a proton within the nucleus. Beta minus (\u03b2\u207b) decay is a type of radioactive decay in which a neutron (n) within an atomic nucleus is converted into a proton (p). In this process, an electron (e\u207b) and an electron antineutrino (\u03bd\u0304e) are emitted from the nucleus. The reaction is typically written as: n \u2192 p + e\u207b + \u03bd\u0304e. The electron is not pre-existing within the nucleus; it is created during this transformation. The atomic number of the nucleus increases by one, while the mass number remains unchanged.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/in-a-radioactive-decay-of-a-nucleus-an-electron-is-also-emitted-this\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"In a radioactive decay of a nucleus, an electron is also emitted. This\" \/>\n<meta property=\"og:description\" content=\"In radioactive beta minus (\u03b2\u207b) decay, an electron is emitted because a neutron is converted into a proton within the nucleus. Beta minus (\u03b2\u207b) decay is a type of radioactive decay in which a neutron (n) within an atomic nucleus is converted into a proton (p). In this process, an electron (e\u207b) and an electron antineutrino (\u03bd\u0304e) are emitted from the nucleus. The reaction is typically written as: n \u2192 p + e\u207b + \u03bd\u0304e. The electron is not pre-existing within the nucleus; it is created during this transformation. The atomic number of the nucleus increases by one, while the mass number remains unchanged.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/in-a-radioactive-decay-of-a-nucleus-an-electron-is-also-emitted-this\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:17:58+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"In a radioactive decay of a nucleus, an electron is also emitted. 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