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Taking the Bohr radius a(0) = 53 pm, the...

Taking the Bohr radius `a_(0) = 53` pm, the radius of `Li^(++)` ion in its gnround state, on the basis of Bohr's model, will be about.

A

53 pm

B

27 pm

C

18 pm

D

13 pm

Text Solution

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The correct Answer is:
C
The atomic number of lithium is 3 , therefore, the radius of `Li^(+ + )` ion in its ground state, on the basis of Bohr’s model, will be about `(1)/(3)` times to that of Bohr radius. Therefore, the radius of lithium ion is near 53/3 `~~` 18pm
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