The $^{68}\text{Ge}$ isotope has medical applications because it undergoes a spontaneous radioactive change to form an isotope of a different element, $^{68}\text{X}$, which can be used to detect tumours. This change in $^{68}\text{Ge}$ happens when an electron enters the nucleus and turns a proton into a neutron. Which statement about the composition of an atom of $^{68}\text{X}$ is correct?
- AIt has 4 electrons in its outer $p$ orbitals.
- BIt has 13 electrons in its outer shell.
- CIt has 37 neutrons.
- DIts proton number is 32.