Periodic Table/Chart of Nuclides

Chart of Nuclides

3,557 known nuclides · 337 stable — Color by half-life or decay mode

Each cell represents a known nuclide. The diagonal dashed line marks N=Z (equal protons and neutrons). Stable nuclides cluster near this line for light elements, then drift towards neutron-rich configurations for heavier elements — the valley of stability.

Data source: IAEA LiveChart of Nuclides (ENSDF evaluation).

Binding Energy per Nucleonfusion · fission · magic numbers

Binding Energy per Nucleon

0255075100125150175200225250275Mass Number (A)Binding Energy / A (MeV)⁴He¹²C¹⁶O⁵⁶Fe⁶²Ni²³⁸U

Peak near A≈56–62 (iron/nickel) — the most tightly bound nuclei. Fusion powers stars up to this peak; fission releases energy above it.