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The schrodinger wave equation for hydrog...

The schrodinger wave equation for hydrogen atom is `Psi_2 = (1)/(4sqrt(2pi))((1)/(a_0))^(3//2) (2-(r)/(a_0))e^(-r//a_0)` where `a_0` is Bohr.s radius. If the radial node in 2s be at `r_0` would be equal to

A

`(a_(0))/(Z),(3a_(0))/(Z)`

B

`(a_(0))/(2Z),(a_(0))/(Z)`

C

`(a_(0))/(2Z),(3a_(0))/(Z)`

D

`(a_(0))/(2Z),(4a_(0))/(Z)`

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