1. Tardigrade
  2. Question
  3. Chemistry
  4. The one electron species having ionization energy of 54.4 eV is

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The one electron species having ionization energy of 54.4 eV is

CMC MedicalCMC Medical 2011

Solution:

$ {{E}_{n}}=\frac{-13.6\times {{(Z)}^{2}}}{{{n}^{2}}}eV $ If $ n=1 $ $ {{E}_{n}}=-13.6\,{{Z}^{2}} $ $ \therefore $ $ {{Z}^{2}}=\frac{-\,54.4}{-13.6} $ $ {{Z}^{2}}=4 $ $ Z=2 $ Thus, the species with atomic number 2 (i.e., $ H{{e}^{+}} $ ) has the ionisation energy 54.4 eV.