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Standard XII
Chemistry
Electron Gain Enthalpy
Q. Smallest a...
Question
Q. Smallest among these species is:
Options:
A. Lithium ion
B. Hydrogen
C. Lithium
D. Helium
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Solution
Answer is helium
Atomic radius of hydrogen is 53 pm
And that of helium is 31pm
And of lithium is 152 pm
Ionic radius of Li+ is 74 pm
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