The graph shows a plot of neutron number N N\,N against proton number Z Z\,Z for stable atomic nuclei, along with a dashed reference line representing N=ZN = ZN=Z.
The unstable medical isotope fluorine-18 (918F{}^{18}_{9}\text{F}918F), represented by point P P\,P on the graph, has proton number Z=9Z = 9Z=9 and neutron number N=9N = 9N=9.
By which mode of decay is fluorine-18 most likely to decay to become more stable?
α\alphaα emission
β+\beta^+β+ emission
β−\beta^-β− emission
γ\gammaγ emission
