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Practicing real exam questions helps you understand the exam pattern, improve accuracy, and boost your JEE score. Perfect for students aiming for top ranks in IIT-JEE.","tags","jee main joint entrance examination india","version","vip","location",{"_391":392,"_393":394},"type","Point","coordinates",[395,396],79.0888,21.1466,"in","priority",12,"createdOn",1756744302186,"updatedOn","questionsCount",24748,"courseCount",9,"examKey","questionData",{"_369":410,"_411":412,"_413":414,"_278":416,"_417":418,"_263":370,"_419":420,"_421":422,"_110":427},"GfHrNB2mO2kSaRhQXbt96fFTU13mNm","q","The 71^st electron of an element X with an atomic number of 71 enters into the orbital :","ans",[415],3,"2019 - 10th January Evening Slot","course","chemistry","exp","In lutetium (⁷¹Lu) the 71^st electron enters in 5d-orbital.\n

Electron configuration is [Xe]4f¹⁴5d¹6s²","opts",[423,424,425,426],"4f","6s","6p","5d",18,"18","initComment","initReply","actionData","errors"]

JEE MAIN - Chemistry (2019 - 10th January Evening Slot - No. 18)

Explanation

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