6 electrons, 6 protons, and 8 neutrons. This is because in isotopes of the same element, proton and electron number are the same, it is only the number of neutrons that changes.
Isotopes are atoms of the same elements with the same atomic number but different mass numbers.
They differ in the number of neutrons.
In this case 13C, 12C and 14 C are three isotopes of carbon; such that 12C has 6 neutrons and 13C has 7 neutrons and 14C has 8 electronsin their nucleus. They have the same number or electrons and protons.
