d- and f-Block Elements: JEE Main 2019 Chemistry question

JEE Main 2019 · 10 Jan, Evening shift · Q809

JEE Main 201910 Jan, Evening shiftChemistryEasyd- and f-Block Elements158× since 2002

The 71^st electron of an element X with an atomic number of 71 enters into the orbital :

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JEE Main 2019 d- and f-Block Elements Question with Solution (10 Jan Evening shift, Q809) | JEE Arc