The ionization potential (IP) is the energy required to remove an electron from the ground state of an atom. For a hydrogen atom, the ionization potential is given by:
\[
\text{IP} = \frac{13.6 \, \text{eV}}{1^2} = 13.6 \, \text{eV}.
\]
Correct Answer: The ionization potential of the electron in the ground state of a hydrogen atom is \( 13.6 \, \text{eV} \).