Thermal neutrons are produced that collide with the nuclei of nitrogen-14, forming carbon-14 and a proton.IsotopesIsotopes of carbon are atomic nuclei that contain six protons plus a number of neutrons (varying from 2 to 16).. 
It is maakatirably more Expensive than helium, since air is its only source.Ìtọ́kasí  àwọn Elimẹ́ńtì Kemia ẹ̀fúùfù aìrẹire.. 