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 $
