Carbon exists naturally in three isotopes, $^{12}\text{C}$, $^{13}\text{C}$ and $^{14}\text{C}$. Which statement explains why these isotopes have identical chemical properties?
- AThey have the same number of electrons in the first shell.
- BThey have the same number of electrons in the outer shell.
- CThey have the same number of neutrons in the nucleus.
- DThey have the same number of protons as neutrons.