Chemistry · 2010
NEET 2010 · Prelims · Code A · Q65
Which one of the following ions has electronic configuration [ Ar ] 3 d^6? (At. nos. Mn =25, Fe =26, Co =27, Ni =28 )
Which one of the following ions has electronic configuration $\displaystyle [\mathrm{Ar}] 3 \mathrm{d}^6$ ?
(At. nos. $\displaystyle \mathrm{Mn}=25, \mathrm{Fe}=26, \mathrm{Co}=27, \mathrm{Ni}=28$)
Official answer
(1)
$\displaystyle \mathrm{Co}^{3+}$
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NEET (UG) 2010 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.