Chemistry · 2023
JEE Main · 1 February 2023, Shift 2 · Q31
Which one of the following sets of ions represents a collection of isoelectronic species? (Given: Atomic Number: F: 9, Cl: 17, Na =11, Mg =12, Al…
Which one of the following sets of ions represents a collection of isoelectronic species?
(Given : Atomic Number : $\displaystyle \mathrm{F} \mathrm{:} \mathrm{9} ,\mathrm{Cl} \mathrm{:} \mathrm{17} ,\mathrm{Na}=11, \mathrm{Mg}=12, \mathrm{Al}=13, \mathrm{~K}=19, \mathrm{Ca}=20, \mathrm{Sc}=21$ )
Official answer
From NTA’s final answer key for this paper.
(3)
$\displaystyle \mathrm{K}^{+}, \mathrm{Cl}^{-}, \mathrm{Ca}^{2+}, \mathrm{Sc}^{3+}$
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JEE Main 2023 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.