Aside: Carbon-13 has one more neutron than Carbon-12, so the unpaired neutron gives it a magnetic moment which is what is used for C13 Nuclear Magnetic Resonanc

Aside: Carbon-13 has one more neutron than Carbon-12, so the unpaired neutron gives it a magnetic moment which is what is used for C13 Nuclear Magnetic Resonance (NMR) spectroscopy. https://en.wikipedia.org/wiki/Carbon-13_nuclear_magnetic_resonance https://en.wikipedia.org/wiki/Carbon-13_nuclear_magnetic_res...