Atomic Number: 88 Atomic Weight: 226.02544 Melting Point (°C): 700 Boiling Point (°C): 1140 Density: 5.5 g/cm³ (20 °C) Half Life: 1622 years
Discovered: Discovered by: Sources: bröggerite, cleveite, carnotite, pitchblende, spring and sea water Uses: clocks, specialized paints Element Trivia: decay of radium is the source for radon