A) in nucleus
B) in ground energy state
C) in first excited state
D) at infinite distance from the nucleus
Correct Answer: D
Solution :
Key Idea The energy of electron is given by \[{{E}_{n}}=\frac{13.6\,\,{{Z}^{2}}}{{{n}^{2}}}eV\]/atom where Z is atomic number. n is number of orbits. \[{{E}_{n}}\propto \left[ -\frac{1}{{{n}^{2}}} \right]\] Hence, as the value of n increases, energy of the electron also increases. Therefore, when n becomes infinite, energy also becomes infinite. Hence, due to this reason the maximum energy possessed by an electron, when it is present at infinite distance from the nucleus.
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