stable · unstable (a weak decay: β⁺, β⁻ or electron capture), its mode and half-life in the box when zoomed in. Neutrons across, protons up, each row an element; brighter the more of it there is in the core (down to a billionth by mass). Arrows are the net flows of matter now, thicker the faster; the ones touching the selected nucleus are highlighted.
Zoom with the wheel, a pinch, a double tap or the buttons; drag to pan; tap a nucleus to select it. The diagonal is N = Z, where helium-4's multiples sit: the heavy stages climb it, and silicon burning ends at its top, nickel-56. Rates from REACLIB; half-lives from the standard tables.