JEE Main 2020 · ChemistryMultiple choiceSingle correctHardApplication

JEE Main 3 September 2020, Shift 2, Chemistry Q30

Question 30 of 75 in this shift, Chemistry question 5 of 25.

Consider the hypothetical situation where the azimuthal quantum number,

l

, takes values 0, 1, 2, ...... n + 1, where n is the principal quantum number. Then, the element with atomic number :

(1)6 has a 2p-valence subshell
(2)8 is the first noble gas
(3)9 is the first alkali metal
(4)13 has a half-filled valence subshellOfficial answer

Official answer

Option 4

NTA final key (Sep 2020).

Chapter: Structure of Atom
Topic: Quantum Numbers
Idea tested: Azimuthal Quantum Number

Same topic in other shifts

All Quantum Numbers questions

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.