* Protons: The number of protons defines the element. Carbon always has 6 protons.
* Neutrons: The isotope number (6 in this case) tells you the total number of protons and neutrons. Since carbon-6 has 6 protons, it must have 0 neutrons.
* Electrons: In a neutral atom, the number of electrons equals the number of protons. Therefore, carbon-6 has 6 electrons.
Important Note: Carbon-6 is a very unstable isotope and doesn't exist naturally. The most common isotope of carbon is Carbon-12, which has 6 protons and 6 neutrons.