{"id":85527,"date":"2025-06-01T03:19:50","date_gmt":"2025-06-01T03:19:50","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=85527"},"modified":"2025-06-01T03:19:50","modified_gmt":"2025-06-01T03:19:50","slug":"the-correct-order-of-atomic-radius-of-li-na-be-and-o-is","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/the-correct-order-of-atomic-radius-of-li-na-be-and-o-is\/","title":{"rendered":"The correct order of atomic radius of Li, Na, Be and O is"},"content":{"rendered":"

The correct order of atomic radius of Li, Na, Be and O is<\/p>\n

[amp_mcq option1=”Na > Li > Be > O” option2=”Na > Be > Li > O” option3=”Be > Li > Na > O” option4=”O > Be > Li > Na” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CDS-1 – 2024<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct order of atomic radius from largest to smallest is Na > Li > Be > O.
\n<\/section>\n
\nAtomic radius increases down a group in the periodic table due to the addition of electron shells. Atomic radius generally decreases across a period from left to right due to increasing effective nuclear charge pulling the valence electrons closer to the nucleus.
\n<\/section>\n
\n– Na (Sodium) is in Group 1, Period 3. It has three electron shells.
\n– Li (Lithium), Be (Beryllium), and O (Oxygen) are all in Period 2. They have two electron shells.
\n– Comparing Na and Li: Na is below Li in Group 1, so Na > Li in atomic radius.
\n– Comparing Li, Be, and O: They are in Period 2. Moving from left to right, atomic radius decreases. So, Li > Be > O.
\nCombining these, the order from largest to smallest is Na > Li > Be > O.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

The correct order of atomic radius of Li, Na, Be and O is [amp_mcq option1=”Na > Li > Be > O” option2=”Na > Be > Li > O” option3=”Be > Li > Na > O” option4=”O > Be > Li > Na” correct=”option1″] This question was previously asked in UPSC CDS-1 – 2024 Download PDFAttempt … <\/p>\n

Detailed SolutionThe correct order of atomic radius of Li, Na, Be and O 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":[1087],"tags":[1103,1162,1096],"class_list":["post-85527","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-1","tag-1103","tag-atomic-structure","tag-chemistry","no-featured-image-padding"],"yoast_head":"\nThe correct order of atomic radius of Li, Na, Be and O is<\/title>\n<meta name=\"description\" content=\"The correct order of atomic radius from largest to smallest is Na > Li > Be > O. Atomic radius increases down a group in the periodic table due to the addition of electron shells. Atomic radius generally decreases across a period from left to right due to increasing effective nuclear charge pulling the valence electrons closer to the nucleus.\" \/>\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-correct-order-of-atomic-radius-of-li-na-be-and-o-is\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The correct order of atomic radius of Li, Na, Be and O is\" \/>\n<meta property=\"og:description\" content=\"The correct order of atomic radius from largest to smallest is Na > Li > Be > O. Atomic radius increases down a group in the periodic table due to the addition of electron shells. 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