Periodic Table with Radioactive Half-Life Color Coding | Chemistry Reference #3266662 (License: Personal Use)

Each element is shaded according to its half-life range, as defined by the legend: stable (light purple), billions of years (light blue), down to milliseconds (bright red) and undetermined (black). Notable patterns include short-lived transuranic elements (reds/oranges) and long-lived isotopes like uranium and thorium (light blues/greens). The table includes all confirmed elements up to oganesson (118).

Used in educational websites, chemistry textbooks, and nuclear science resources to teach radioactive decay, isotope stability, and periodic trends. Matches user intent for visual learning, exam prep, or quick reference on element lifetimes.