{"id":87765,"date":"2025-06-01T06:53:45","date_gmt":"2025-06-01T06:53:45","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87765"},"modified":"2025-06-01T06:53:45","modified_gmt":"2025-06-01T06:53:45","slug":"which-one-of-the-following-conclusions-could-not-be-derived-from-rut","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-conclusions-could-not-be-derived-from-rut\/","title":{"rendered":"Which one of the following conclusions could not be derived from Rut"},"content":{"rendered":"

Which one of the following conclusions could not<\/b> be derived from Rutherford’s \u03b1-particle scattering experiment ?<\/p>\n

[amp_mcq option1=”Most of the space in the atom is empty.” option2=”The radius of the atom is about 10\u2075 times the radius of the nucleus.” option3=”Electrons move in a circular path of fixed energy called orbits.” option4=”Nearly all the mass of the atom resides in the nucleus.” correct=”option3″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-1 – 2021<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nRutherford’s alpha-particle scattering experiment (Gold foil experiment) led to the discovery of the atomic nucleus and the proposal of the nuclear model of the atom. The key conclusions were:
\nA) Most alpha particles passed straight through, indicating that most of the atom is empty space.
\nD) A small fraction of particles were deflected at large angles or bounced back, indicating the presence of a dense, positively charged nucleus containing most of the mass in a tiny volume.
\nB) Based on the trajectories, Rutherford estimated the size of the nucleus relative to the atom.
\nHowever, Rutherford’s model did not explain the stability of the atom (electrons orbiting a nucleus should lose energy and spiral into the nucleus) nor the observed atomic spectra. The idea that electrons move in specific circular paths of fixed energy (orbits) was a postulate introduced later by Niels Bohr to address these issues, building upon Rutherford’s model. Therefore, this conclusion was not derived from Rutherford’s experiment.
\n<\/section>\n
\nRutherford’s model established the concept of a nucleus but did not explain electron behaviour in detail. Bohr’s model later quantized electron energy levels and introduced the concept of stable orbits.
\n<\/section>\n
\nThe planetary model is often associated with Rutherford, but the idea of quantized orbits is specifically from Bohr. The scattering experiment involved firing alpha particles (He\u00b2\u207a ions) at a thin gold foil and observing their deflection patterns.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following conclusions could not be derived from Rutherford’s \u03b1-particle scattering experiment ? [amp_mcq option1=”Most of the space in the atom is empty.” option2=”The radius of the atom is about 10\u2075 times the radius of the nucleus.” option3=”Electrons move in a circular path of fixed energy called orbits.” option4=”Nearly all the mass … <\/p>\n

Detailed SolutionWhich one of the following conclusions could not be derived from Rut<\/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":[1093],"tags":[1110,1203,1128],"class_list":["post-87765","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1110","tag-nuclear-physics","tag-physics","no-featured-image-padding"],"yoast_head":"\nWhich one of the following conclusions could not be derived from Rut<\/title>\n<meta name=\"description\" content=\"Rutherford's alpha-particle scattering experiment (Gold foil experiment) led to the discovery of the atomic nucleus and the proposal of the nuclear model of the atom. The key conclusions were: A) Most alpha particles passed straight through, indicating that most of the atom is empty space. D) A small fraction of particles were deflected at large angles or bounced back, indicating the presence of a dense, positively charged nucleus containing most of the mass in a tiny volume. B) Based on the trajectories, Rutherford estimated the size of the nucleus relative to the atom. However, Rutherford's model did not explain the stability of the atom (electrons orbiting a nucleus should lose energy and spiral into the nucleus) nor the observed atomic spectra. The idea that electrons move in specific circular paths of fixed energy (orbits) was a postulate introduced later by Niels Bohr to address these issues, building upon Rutherford's model. Therefore, this conclusion was not derived from Rutherford's experiment. Rutherford's model established the concept of a nucleus but did not explain electron behaviour in detail. Bohr's model later quantized electron energy levels and introduced the concept of stable orbits.\" \/>\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\/which-one-of-the-following-conclusions-could-not-be-derived-from-rut\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which one of the following conclusions could not be derived from Rut\" \/>\n<meta property=\"og:description\" content=\"Rutherford's alpha-particle scattering experiment (Gold foil experiment) led to the discovery of the atomic nucleus and the proposal of the nuclear model of the atom. The key conclusions were: A) Most alpha particles passed straight through, indicating that most of the atom is empty space. D) A small fraction of particles were deflected at large angles or bounced back, indicating the presence of a dense, positively charged nucleus containing most of the mass in a tiny volume. B) Based on the trajectories, Rutherford estimated the size of the nucleus relative to the atom. However, Rutherford's model did not explain the stability of the atom (electrons orbiting a nucleus should lose energy and spiral into the nucleus) nor the observed atomic spectra. The idea that electrons move in specific circular paths of fixed energy (orbits) was a postulate introduced later by Niels Bohr to address these issues, building upon Rutherford's model. Therefore, this conclusion was not derived from Rutherford's experiment. Rutherford's model established the concept of a nucleus but did not explain electron behaviour in detail. Bohr's model later quantized electron energy levels and introduced the concept of stable orbits.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-conclusions-could-not-be-derived-from-rut\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:53:45+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":"Which one of the following conclusions could not be derived from Rut","description":"Rutherford's alpha-particle scattering experiment (Gold foil experiment) led to the discovery of the atomic nucleus and the proposal of the nuclear model of the atom. The key conclusions were: A) Most alpha particles passed straight through, indicating that most of the atom is empty space. D) A small fraction of particles were deflected at large angles or bounced back, indicating the presence of a dense, positively charged nucleus containing most of the mass in a tiny volume. B) Based on the trajectories, Rutherford estimated the size of the nucleus relative to the atom. However, Rutherford's model did not explain the stability of the atom (electrons orbiting a nucleus should lose energy and spiral into the nucleus) nor the observed atomic spectra. The idea that electrons move in specific circular paths of fixed energy (orbits) was a postulate introduced later by Niels Bohr to address these issues, building upon Rutherford's model. Therefore, this conclusion was not derived from Rutherford's experiment. Rutherford's model established the concept of a nucleus but did not explain electron behaviour in detail. 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