# How can you identify two ways in which carbon-12, carbon-13, and carbon-14 are alike?

All the carbon nuclides have $Z = 6$...........
All the carbon nuclides have $Z = 6$, where $Z$ equals the number of massive, positively charge particles present in the carbon nucleus. Of course, in the given isotopes, ""^12C, ""^13C, ""^14C, there are $6$, $7$, and $8$ neutrons, massive, neutrally charged nuclear particles in each nucleus.