Number of Energy Levels: 7
Electrons on the outer energy level: 2
Atomic number: 93
Atomic Mass: 237 Amu (Atomic Mass Units)
Density: 20.45 g/cm3
Classification: Rare Earth
Neptunium was discovered in 1940 by Edwin McMillan and Phillip H. Abelson. Its name derives from the name of the planet Neptune. Neptunium’s melting point is at 640.0 °C (913.15 K, 1184.0 °F) and its boiling point is at 3902.0 °C (4175.15 K, 7055.6 °F).
Top 10 interesting facts about Neptunium
Neptunium is a ductile, hard, and radioactive metal.
Neptunium is a fissionable element.
Neptunium has a silvery color and tarnishes in the air.
Most of neptunium is produced in nuclear reactors as a by-product.
Neptunium is also found in uranium ores in very small amounts as a decay product of other isotopes.
All neptunium’s isotopes are unstable and the most stable isotope of neptunium is 237-neptunium.
Neptunium is used in detectors of high-energy neutrons.
Neptunium is used as a precursor in plutonium production.
Neptunium could be used as fuel for fast neutron reactors and in nuclear weapons.