# an electron in the n=2, l=1 in the hydrogen atom a) Calculate the value of r at which the radial probability…

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**Question:**

an electron in the n=2, l=1 in the hydrogen atom

a) Calculate the value of r at which the radial probability density reaches its maximum for this state (in units of a, the Bohr radius);

b) Calculate the expectation value <r>21 for this state (in unites of a, the Bohr radius.)

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