Atomic Number: 93 Atomic Weight: 237.0482 Melting Point (°C): 640 Boiling Point (°C): 3902 Density: 20.45 g/cm³ (25 °C) Half Life: 21,400 years
Discovered: Discovered by: Sources: produced by uranium reaction with neutrons Uses: Element Trivia: Like Mercury, shares its name with a Roman god and a planet; but there no car named the "Neptune"