The plot shows a number of neutrons versus a number of protons. The number of neutrons (n) is measured from 0 to 160 on the y-axis, while the number of protons (p) is measured from 0 to 100 on the x-axis. There is a straight line representing the 1 to 1 neutron-to-proton ratio. It starts from 0 neutrons and 0 protons and ends at 100 neutrons and 100 protons. An elongated shaded area representing the belt of stability starts from 0 neutrons and 0 protons and goes up until it reaches the top right part of the plot. The belt passes through the following positions: Superscript 16 Subscript 8 Baseline O (n slash p equals 1.00), Superscript 56 Subscript 26 Baseline Fe (n slash p equals 1.15), Superscript 127 Subscript 53 Baseline I (n slash p equals 1.40), and Superscript 209 Subscript 83 Baseline Bi (n slash p equals 1.52). For the nuclei above the belt, the dominant mode is beta emission. For the nuclei below, the dominant mode is positron emission or electron capture. For the nuclei with Z greater than 83, the dominant mode is alpha emission.