{"id":90721,"date":"2025-06-01T10:35:17","date_gmt":"2025-06-01T10:35:17","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=90721"},"modified":"2025-06-01T10:35:17","modified_gmt":"2025-06-01T10:35:17","slug":"the-atomic-radius-of-hydrogen-atom-is","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/the-atomic-radius-of-hydrogen-atom-is\/","title":{"rendered":"The atomic radius of hydrogen atom is"},"content":{"rendered":"

The atomic radius of hydrogen atom is<\/p>\n

[amp_mcq option1=”37 nanometer” option2=”37 picometer” option3=”17 picometer” option4=”57 picometer” correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CAPF – 2022<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe atomic radius of a hydrogen atom is approximately 37 picometers (pm) when considered as a covalent radius, or about 52.9 pm for the Bohr radius. Given the options, 37 picometer is the closest and a commonly cited value for the covalent radius of hydrogen.
\n<\/section>\n
\n– The size of an atom is often described by its radius.
\n– Different definitions of atomic radius exist (e.g., covalent radius, van der Waals radius, Bohr radius) which yield different values.
\n– 1 picometer (pm) = 10\u207b\u00b9\u00b2 meters.
\n– 1 nanometer (nm) = 10\u207b\u2079 meters = 1000 picometers.
\n– A radius of 37 nanometers would be extremely large, equivalent to 37,000 picometers, which is not the size of a hydrogen atom.
\n<\/section>\n
\nThe Bohr radius (a\u2080) for the ground state of hydrogen is approximately 52.9 pm. The covalent radius of hydrogen, often determined from the H-H bond length in H\u2082 (about 74 pm), is taken as half of this length, i.e., 37 pm. The van der Waals radius of hydrogen is significantly larger, around 120 pm. The question does not specify which type of radius, but 37 pm is a valid and commonly used value for its covalent radius.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

The atomic radius of hydrogen atom is [amp_mcq option1=”37 nanometer” option2=”37 picometer” option3=”17 picometer” option4=”57 picometer” correct=”option2″] This question was previously asked in UPSC CAPF – 2022 Download PDFAttempt Online The atomic radius of a hydrogen atom is approximately 37 picometers (pm) when considered as a covalent radius, or about 52.9 pm for the Bohr … <\/p>\n

Detailed SolutionThe atomic radius of hydrogen atom is<\/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":[1108,1162,1096],"class_list":["post-90721","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1108","tag-atomic-structure","tag-chemistry","no-featured-image-padding"],"yoast_head":"\nThe atomic radius of hydrogen atom is<\/title>\n<meta name=\"description\" content=\"The atomic radius of a hydrogen atom is approximately 37 picometers (pm) when considered as a covalent radius, or about 52.9 pm for the Bohr radius. Given the options, 37 picometer is the closest and a commonly cited value for the covalent radius of hydrogen. - The size of an atom is often described by its radius. - Different definitions of atomic radius exist (e.g., covalent radius, van der Waals radius, Bohr radius) which yield different values. - 1 picometer (pm) = 10\u207b\u00b9\u00b2 meters. - 1 nanometer (nm) = 10\u207b\u2079 meters = 1000 picometers. - A radius of 37 nanometers would be extremely large, equivalent to 37,000 picometers, which is not the size of a hydrogen atom.\" \/>\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\/the-atomic-radius-of-hydrogen-atom-is\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The atomic radius of hydrogen atom is\" \/>\n<meta property=\"og:description\" content=\"The atomic radius of a hydrogen atom is approximately 37 picometers (pm) when considered as a covalent radius, or about 52.9 pm for the Bohr radius. Given the options, 37 picometer is the closest and a commonly cited value for the covalent radius of hydrogen. - The size of an atom is often described by its radius. - Different definitions of atomic radius exist (e.g., covalent radius, van der Waals radius, Bohr radius) which yield different values. - 1 picometer (pm) = 10\u207b\u00b9\u00b2 meters. - 1 nanometer (nm) = 10\u207b\u2079 meters = 1000 picometers. - A radius of 37 nanometers would be extremely large, equivalent to 37,000 picometers, which is not the size of a hydrogen atom.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/the-atomic-radius-of-hydrogen-atom-is\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:35:17+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=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"The atomic radius of hydrogen atom is","description":"The atomic radius of a hydrogen atom is approximately 37 picometers (pm) when considered as a covalent radius, or about 52.9 pm for the Bohr radius. 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