inert "Noble" gases, for example, were unknown until the very end of the 19thC.
Polonium after her natal country - although she did all her scientific work in France. Perey got naming rights after her discovery and took her hat off for La Belle France. Francium is found in ores rich in Uranium as part of a natural decay chain [L - there is one error in the numbers shown - check the actinium Ac], because it is so fizzy and unstable, they estimate that at any one time there is only about 30g present on Earth at any one time. But if you try to grasp it, let alone analyse it, the damned stuff slips through your fingers to become astatine At. The vertical downward lines connecting the various elements in the diagram [L] are the result of alpha decay - where the nucleus shed 2 protons and two neutrons, so the atomic number goes down by 2 and the atomic weight decreases by 4 units. The up&right diagonal lines are the result of β decay which, by losing a massless negative charge, makes a new element with the same mass.
- Д.K. Добросердов in Odessa claimed success in 1925 and named it russium
- G.J.F. Druce and F.H. Loring from England named something alkalinium in 1926
- In 1930, F. Allison in the USA wanted to call his stuff virginium
- H. Hulubei and his French colleague Yvette Cauchois went public in 1936 with moldovium