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Question

For the 1s orbital of the Hydrogen atom, the radial wave function is given as:
R(r)=1π(1a0)32era0 (Where a0=0.529 A)

The ratio of radial probability density of finding an electron at r=a0 to the radial probability density of finding an 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=a0Radial probability density atr=0=R2(a0)R2(0)

For 1s orbital: R(r)=1π(1a0)32era0

Hence,

R2(a0)R2(0)=(1πa30)e2ra0(1πa30)e0=e2

Hence, according to x.ey given in question.

Here, x=1, y=2 and (X+Y)=3


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