Discovery of astatine

Astatine is a chemical element; it has symbol At and atomic number 85. It is the rarest naturally occurring element in the Earth's crust, occurring only as the decay product of various heavier elements. All of astatine's isotopes are short-lived; the most stable is astatine-210, with a half-life of 8.1 hours.

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

Which happened first?

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

Timeline

1. Discovery of technetium1937
2. Discovery of francium1939
3. Discovery of astatine (this page)1940
4. Discovery of neptunium1940
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