Discovery of neptunium

Neptunium is a chemical element; it has symbol Np and atomic number 93. A radioactive actinide metal, neptunium is the first transuranic element. It is named after Neptune, the planet beyond Uranus in the Solar System, which uranium is named after.

Summary from Wikipedia (CC BY-SA 4.0) · Dates from Wikidata (CC0)

Which happened first?

• Discovery of neptunium and Discovery of astatine happened in the same year
• Discovery of neptunium happened 1 year before Discovery of plutonium
• Discovery of neptunium happened 1 year after Discovery of francium
• Discovery of neptunium happened 3 years after Discovery of technetium
• Discovery of neptunium happened 4 years before Discovery of americium

Timeline

1. Discovery of technetium1937
2. Discovery of francium1939
3. Discovery of astatine1940
4. Discovery of neptunium (this page)1940
5. Discovery of plutonium1941
6. Discovery of americium1944

Related

• Discovery of hydrogen1766
• Discovery of oxygen1774
• Discovery of PlutoFebruary 18, 1930
• Discovery of carbon1789
• Discovery of aluminium1825
• Discovery of heliumAugust 18, 1868
• Discovery of nitrogen1772
• Discovery of sulfur1777