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Question: Answered & Verified by Expert
The quantum numbers for the outermost electron of an element are given below as $n=2, l=0, m=0, s=+\frac{1}{2}$. The atom is
ChemistryStructure of AtomJEE Main
Options:
  • A Lithium
  • B Beryllium
  • C Hydrogen
  • D Boron
Solution:
2523 Upvotes Verified Answer
The correct answer is: Lithium
The electronic configuration must be $1 s^2 2 s^1$. Hence, the element is lithium $(z=3)$.

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