The element with atomic number 59 lies in which block of the Periodic Table?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. The f-block.
The element with atomic number 59 is Praseodymium (Pr), which belongs to the lanthanide series. Lanthanides are part of the f-block of the Periodic Table because their valence electrons enter the 4f orbital.
Additional details:
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s-block: Groups 1–2; valence electrons in s-orbital.
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p-block: Groups 13–18; valence electrons in p-orbital.
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d-block: Transition elements; valence electrons in d-orbital.
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f-block: Inner transition elements, including lanthanides and actinides; characterized by filling of f-orbitals.