In a sample of pure carbon some of the atoms have more neutrons than the others this shows that carbon exists in several different?

In a sample of pure carbon, the presence of atoms with varying numbers of neutrons indicates that carbon exists in several different isotopes. The most common isotopes of carbon are carbon-12 and carbon-14, which differ in their neutron count but share the same number of protons. This variation in neutron number affects the stability and nuclear properties of the isotopes, leading to different behaviors in chemical reactions and applications.