# Which subatomic particles are located in the nucleus of a carbon atom?

The atomic nucleus contains protons and usually neutrons (except for hydrogen-1 (protium) atoms. The number of protons is an element's atomic number and is the same for all atoms of an element. Carbon has atomic number $6$. So all atoms of carbon have $6$ protons in their atomic nuclei. Carbon atoms also contain neutrons in their atomic nuclei, which may number $6$, $7$, or $8$.