Atoms And Nuclei Question 122

Question: Minimum energy required to takeout the only one electron from ground state of $ H{{e}^{+}} $ is [CPMT 2002]

Options:

A) 13.6 eV

B) 54.4 eV

C) 27.2 eV

D) 6.8 eV

Show Answer

Answer:

Correct Answer: B

Solution:

$ E_{n}=-\frac{13.6z^{2}}{n^{2}}eV\Rightarrow E_{1}=-\frac{13.6\times {{(2)}^{2}}}{{{(1)}^{2}}}=-54.4\ eV $



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