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Question

For 1s orbital of Hydrogen atom radial wave function is given as:
R(r)=1π(1a0)3/2er/a0 where a0=0.529 A)
The ratio of radial probability density of finding electron at r=ao to the radial probability density of finding electron at the nucleus is given as (x.ey). Calculate the value of (x + y)


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Solution

Radial probability density at r=a0 Radial probability density at r=0=R2(a0)R2(0)
For 1s orbital : R(r)=1π(1ao)3/2er/ao
(where a0 =0.529Å)
R2(ao)R2(0)=1π(1ao)3.e21π(1ao)3e0=e2=1.e2
x+y=1+2=3

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