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I read somewhere that it has 13.6eV of energy but I think this is the energy required to release it from orbit. I tried to examine the 13.6eV value to check if it seemed correct using the following method. Can anyone tell me where I've gone wrong? It gave me a value of 14.5nm for the Bohr radius (apparently its meant to be more like 0.05nm)

[tex]E = h\nu[/tex]

[tex]\nu = \frac{c}{\lambda}[/tex]

Assuming quantum number n=1 then circumference of circular orbit =wavelength

[tex]\lambda = 2 \pi r[/tex]

[tex]E = \frac{hc}{2 \pi r}[/tex]

[tex]r = \frac{\hbar c}{E}[/tex]

If I feed in the value E = 13.6eV I get r ~ 14.5nm (which is wrong).

Thanks,

G