{"id":89083,"date":"2025-06-01T07:29:03","date_gmt":"2025-06-01T07:29:03","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=89083"},"modified":"2025-06-01T07:29:03","modified_gmt":"2025-06-01T07:29:03","slug":"which-one-among-the-following-has-valency-of-3","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-among-the-following-has-valency-of-3\/","title":{"rendered":"Which one among the following has valency of 3 ?"},"content":{"rendered":"

Which one among the following has valency of 3 ?<\/p>\n

[amp_mcq option1=”Carbon” option2=”Oxygen” option3=”Nitrogen” option4=”Sodium” correct=”option3″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-2 – 2024<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nNitrogen commonly has a valency of 3, particularly in compounds like ammonia (NH3).
\n<\/section>\n
\n– Valency is the measure of the combining capacity of an element. It is typically equal to the number of electrons an atom gains, loses, or shares to achieve a stable electron configuration (usually a full outermost electron shell).
\n– Carbon (Atomic number 6): Electron configuration is 2, 4. It needs 4 electrons to complete its outer shell, so its common valency is 4 (e.g., CH4, CO2).
\n– Oxygen (Atomic number 8): Electron configuration is 2, 6. It needs 2 electrons, so its common valency is 2 (e.g., H2O, O2).
\n– Nitrogen (Atomic number 7): Electron configuration is 2, 5. It needs 3 electrons to complete its outer shell. Thus, its common valency is 3 (e.g., NH3, NCl3). Nitrogen can also exhibit other valencies (e.g., +5 in nitrates), but 3 is a very common valency.
\n– Sodium (Atomic number 11): Electron configuration is 2, 8, 1. It tends to lose 1 electron to achieve a stable configuration. Its valency is 1 (e.g., NaCl, Na2O).
\n<\/section>\n
\nThe concept of valency is simplified and primarily applies to covalent bonding and simple ionic compounds. More rigorous descriptions of bonding use oxidation states and formal charges, especially for elements in higher periods or in complex compounds. However, for basic elements like N, O, C, and Na, their typical valencies are characteristic.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one among the following has valency of 3 ? [amp_mcq option1=”Carbon” option2=”Oxygen” option3=”Nitrogen” option4=”Sodium” correct=”option3″] This question was previously asked in UPSC NDA-2 – 2024 Download PDFAttempt Online Nitrogen commonly has a valency of 3, particularly in compounds like ammonia (NH3). – Valency is the measure of the combining capacity of an element. It … <\/p>\n

Detailed SolutionWhich one among the following has valency of 3 ?<\/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":[1094],"tags":[1103,1162,1096],"class_list":["post-89083","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-2","tag-1103","tag-atomic-structure","tag-chemistry","no-featured-image-padding"],"yoast_head":"\nWhich one among the following has valency of 3 ?<\/title>\n<meta name=\"description\" content=\"Nitrogen commonly has a valency of 3, particularly in compounds like ammonia (NH3). - Valency is the measure of the combining capacity of an element. It is typically equal to the number of electrons an atom gains, loses, or shares to achieve a stable electron configuration (usually a full outermost electron shell). - Carbon (Atomic number 6): Electron configuration is 2, 4. It needs 4 electrons to complete its outer shell, so its common valency is 4 (e.g., CH4, CO2). - Oxygen (Atomic number 8): Electron configuration is 2, 6. It needs 2 electrons, so its common valency is 2 (e.g., H2O, O2). - Nitrogen (Atomic number 7): Electron configuration is 2, 5. It needs 3 electrons to complete its outer shell. Thus, its common valency is 3 (e.g., NH3, NCl3). Nitrogen can also exhibit other valencies (e.g., +5 in nitrates), but 3 is a very common valency. - Sodium (Atomic number 11): Electron configuration is 2, 8, 1. It tends to lose 1 electron to achieve a stable configuration. Its valency is 1 (e.g., NaCl, Na2O).\" \/>\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-among-the-following-has-valency-of-3\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which one among the following has valency of 3 ?\" \/>\n<meta property=\"og:description\" content=\"Nitrogen commonly has a valency of 3, particularly in compounds like ammonia (NH3). - Valency is the measure of the combining capacity of an element. It is typically equal to the number of electrons an atom gains, loses, or shares to achieve a stable electron configuration (usually a full outermost electron shell). - Carbon (Atomic number 6): Electron configuration is 2, 4. It needs 4 electrons to complete its outer shell, so its common valency is 4 (e.g., CH4, CO2). - Oxygen (Atomic number 8): Electron configuration is 2, 6. It needs 2 electrons, so its common valency is 2 (e.g., H2O, O2). - Nitrogen (Atomic number 7): Electron configuration is 2, 5. It needs 3 electrons to complete its outer shell. Thus, its common valency is 3 (e.g., NH3, NCl3). Nitrogen can also exhibit other valencies (e.g., +5 in nitrates), but 3 is a very common valency. - Sodium (Atomic number 11): Electron configuration is 2, 8, 1. It tends to lose 1 electron to achieve a stable configuration. Its valency is 1 (e.g., NaCl, Na2O).\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-among-the-following-has-valency-of-3\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T07:29:03+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":"Which one among the following has valency of 3 ?","description":"Nitrogen commonly has a valency of 3, particularly in compounds like ammonia (NH3). - Valency is the measure of the combining capacity of an element. It is typically equal to the number of electrons an atom gains, loses, or shares to achieve a stable electron configuration (usually a full outermost electron shell). - Carbon (Atomic number 6): Electron configuration is 2, 4. It needs 4 electrons to complete its outer shell, so its common valency is 4 (e.g., CH4, CO2). - Oxygen (Atomic number 8): Electron configuration is 2, 6. It needs 2 electrons, so its common valency is 2 (e.g., H2O, O2). - Nitrogen (Atomic number 7): Electron configuration is 2, 5. It needs 3 electrons to complete its outer shell. Thus, its common valency is 3 (e.g., NH3, NCl3). Nitrogen can also exhibit other valencies (e.g., +5 in nitrates), but 3 is a very common valency. - Sodium (Atomic number 11): Electron configuration is 2, 8, 1. It tends to lose 1 electron to achieve a stable configuration. 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It is typically equal to the number of electrons an atom gains, loses, or shares to achieve a stable electron configuration (usually a full outermost electron shell). - Carbon (Atomic number 6): Electron configuration is 2, 4. It needs 4 electrons to complete its outer shell, so its common valency is 4 (e.g., CH4, CO2). - Oxygen (Atomic number 8): Electron configuration is 2, 6. It needs 2 electrons, so its common valency is 2 (e.g., H2O, O2). - Nitrogen (Atomic number 7): Electron configuration is 2, 5. It needs 3 electrons to complete its outer shell. Thus, its common valency is 3 (e.g., NH3, NCl3). Nitrogen can also exhibit other valencies (e.g., +5 in nitrates), but 3 is a very common valency. - Sodium (Atomic number 11): Electron configuration is 2, 8, 1. It tends to lose 1 electron to achieve a stable configuration. 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