Discovery of technetium

Technetium is a chemical element; it has symbol Tc and atomic number 43. It is the lightest element whose isotopes are all radioactive. Technetium is one of only two radioactive elements both preceded and succeeded in the periodic table by elements with stable forms, the other being promethium.

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

Which happened first?

• Discovery of technetium happened 2 years before Discovery of francium
• Discovery of technetium happened 3 years before Discovery of neptunium
• Discovery of technetium happened 3 years before Discovery of astatine
• Discovery of technetium happened 4 years before Discovery of plutonium
• Discovery of technetium happened 7 years before Discovery of americium

Timeline

1. Discovery of technetium (this page)1937
2. Discovery of francium1939
3. Discovery of astatine1940
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