Francium was discovered by Marguerite Perey in 1939 during a study on actinium-227: she observed an energy level possibly attributable to a new element. After some chemical experiments she was sure that the radiation is from a new chemical element, after this called francium.
Francium can be detected only by nuclear spectrometry.
Francium exists in uranium and thorium ores.
The existence of francium in cosmos was not proved.
Francium exist in infinitesimal traces in thorium and uranium ores.
francium is found in thorium and uranium ores in the earth's crust obtained by the decay of actinium
Francium is an extremely rare and highly radioactive element, making it difficult to find in nature. Due to its extreme rarity and radioactivity, francium is not commonly found in compounds. However, some theoretical compounds containing francium may include francium fluoride (FrF) or francium hydroxide (FrOH), although these would be highly unstable and challenging to create and study in a laboratory setting.
Francium is named after France, which is where the element was isolated in 1939 by Marguerite Perey. Traces of francium occur naturally in uranium-containing minerals. francium is very rare so it took time to find it (i think)
Not known today but probably francium don't burn.
Francium is the second rarest element on earth so that's probably why it took a little longer to discover.
Francium has not applications and the oxide cannot be prepared.
'FrCl' is Francium chloride. NB Francium(Fr) is the heaviest of the Group(I) [Alkali] metals. You will not find it in the open lab. because it is radioactive.
Francium is a metal.