JEE Main 2019 — Structure Of Atom Question with Solution
From: JEE Main 2019 (Online) 12th April Morning Slot
Question
The group number, number of valence electrons, and valency of an element with atomic number 15,
respectively, are:
Choose an option
Show full solutionCorrect option: D
Correct answer
D15, 5 and 3
Step-by-step explanation
P[15] = [Ne] 3s23p3
Group number = 10 + valance shell electron = 10 + 5 = 15
number of valence electrons = 5
Valency = 3
Group number = 10 + valance shell electron = 10 + 5 = 15
number of valence electrons = 5
Valency = 3
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This is a previous-year question from JEE Main 2019, covering the Structure Of Atom chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.