[填空题]
Using the Bohr formula fhkp3v6o+iq8fcl*al e s0/,w jor t4hf3/itw3qwo7k*i7u pp 3qaas;c 3lihe radius of an electron orbit, estimate the average distance from the nuclosw3i 3aip qqf7w 4c k/*tlp3u 73i;haeus for an electron in the innermost $(n=1)$ orbit of a uranium atom $(Z=92)$. Approximately how much energy would be required to remove this innermost electron?
$r_{\text{uranium}} =$ $ \times 10^{-13}\ \text{m}$
$\text{the binding energy is }$ $ \ \text{keV}$
