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Question: Answered & Verified by Expert
Which of the following has smaller size
Chemistrys Block ElementsJEE Main
Options:
  • A $\mathrm{H}$
  • B $\mathrm{He}^{+}$
  • C ${ }_1 H^2$
  • D $L i^{2+}$
Solution:
2814 Upvotes Verified Answer
The correct answer is: $L i^{2+}$
Lithium-ion is the smallest one because here protons are more than electrons. Protons attract electrons to come closer to the nucleus. So, it reduces its size and this size is less than that of a Hydrogen atom.
So Lithium-ion is the smallest.

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