Accuracy carbon dating fossils
Neutrons that come from these fragmented atoms collide with C to be useful in age estimates.
This is a critical assumption in the dating process.
Carbon-14 is mostly used to date once-living things (organic material). Carbon-14 is constantly being added to the atmosphere.
For example, all carbon atoms have 6 protons, all atoms of nitrogen have 7 protons, and all oxygen atoms have 8 protons.