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According to the Bohr model, the energy levels of hydrogen atom can be found by making two assumptions. (i). The electrons move in circulr orbit and (ii) the angular momentum of the electron in the n^(th) energy level is quantized to have a value n(h)/(2pi). The levels calculated with nuclear charge Ze, with a single electron in the orbit, are called Hydrogenic levels. Assume that the two electrons in the ground state of a helium atom occupy the corresponding lowest Hydrogenic level. Q. if the hydrogen atom ionizatioin temperature is T, the temperature at which He atoms ionise completely (both electron having left the atom) would be:

Answer» <html><body><p>8T<br/>4T<br/>6T<br/>2T</p>Solution :E=<a href="https://interviewquestions.tuteehub.com/tag/ionisation-1051250" style="font-weight:bold;" target="_blank" title="Click to know more about IONISATION">IONISATION</a> energy of He-atom <br/> `=2xx54.4eV`-repulsive energy <br/> `=108.8eV-27.2eV` <br/> `=<a href="https://interviewquestions.tuteehub.com/tag/6xx-1913072" style="font-weight:bold;" target="_blank" title="Click to know more about 6XX">6XX</a>`Ionization energy of <a href="https://interviewquestions.tuteehub.com/tag/hydrogen-22331" style="font-weight:bold;" target="_blank" title="Click to know more about HYDROGEN">HYDROGEN</a> <br/> `therefore` Ionisation <a href="https://interviewquestions.tuteehub.com/tag/temperature-11887" style="font-weight:bold;" target="_blank" title="Click to know more about TEMPERATURE">TEMPERATURE</a> of Helium <br/> `=6xx`Ionisation temperature of hydrogen ltBrgt `=6T`</body></html>


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