NEET UG 2018 · Chemistry · Question 88
NEET 2018 Chemistry, question 88
Question 88 of the NEET 2018 paper (code AA) is a Chemistry question from Classification of Elements and Periodicity in Properties. Its idea, Ionic Formulae from Configurations, was asked only this once in NEET 2017–2026. The CBSE official answer key gives option 4.
Updated 2026-10-08
Q88 · Chemistry
Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is , the simplest formula for this compound is
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Official answer: option 4 · CBSE official answer key
Same idea
The only question on Ionic Formulae from Configurations
No other NEET paper from 2017–2026 tested this exact idea.
Ionic Formulae from Configurations: every question and how it was framed
The chapter
Classification of Elements and Periodicity in Properties in ten years of NEET
13 questions from 2017–2026, asked in 9 of 10 papers, about 1.3 a paper. Periodic Properties alone had 13.