The Wavefunction for the 2s Orbital in Hydrogen Is Given $R_{2 s}=\frac{1}{2 \sqrt{2}}\left(\frac{Z}{a_{0}}\right)^{3 / 2}(2-\sigma) \exp (-\sigma / 2) \text { where } \sigma=\frac{\mathrm{Zr}}{a_{0}}$

question 26

Multiple Choice

The wavefunction for the 2s orbital in hydrogen is given by $R_{2 s}=\frac{1}{2 \sqrt{2}}\left(\frac{Z}{a_{0}}\right) ^{3 / 2}(2-\sigma) \exp (-\sigma / 2) \text { where } \sigma=\frac{\mathrm{Zr}}{a_{0}}$ At what radius is there a node?

• A) r = 0
• B) r = 2/a₀
• C) r = a₀
• D) r = 2a₀
• E) there are no radial nodes in this function

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