Q. 14.6( 9 Votes )

Taking the Bohr r

Answer :

As we know that the radius of an atom in its ground state is given by the formula where a₀ is Bohr’s radius, and Z is atomic number.

Now just putting the values in above formula, we have

a₀ = 53pm and also we know the atomic number of lithium is 3.

Hence rpm ≈ 18pm.

Therefore option (c) is correct.

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