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Francium is a natural chemical element but the total quantity of francium in the earth crust is only approx. 30 g. Francium has ca. 40 isotopes and isomers but only two are natural: 221Fr (in the neptunium decay chain series) and 223Fr (in the actinium decay chain series). Artificially preparation of francium isotopes is also extremely difficult and expensive; and the chemistry and physics of isotopes was developed essentially after 1940. Supplementary, the most stable isotope of francium has a half life of only 21,8 minutes and is strongly radioactive; the half lives of the artificially prepared isotopes are more smaller.
This is sufficient reason to explain why francium was later discovered and why even today is only slightly studied.
What else can I help you with?
What is Franciums period?
FrIO4
What are franciums chemical features?
The chemistry of francium is practically unknown today.
How long after the discovery of cells did it take the scientific Community to accept it?
150 years
How long after the discovery did it take scientific community to accept the existence of the cell?
150 years
Is the discovery rule an exception to the statute of limitations?
The two are not related. The statute of limitations is for getting notice of a suit. Once that is there, discovery can take as long as necessary.
After an oil discovery is made approximately how long does it take the oil to reach the market?
10 years
How long after their discovery did it take the scientific community to accept the existence of cell?
150 years
How long did the ships Susan Constant the Godspeed a the Discovery take to get to America?
It usually took up to 3 or 4 months
What molecules help control movement of substances thought cell membranes?
how long after their discovery did it take the scientific community to accept the existence of cells
Saturn's date of discovery?
Saturn has been visible as long as mankind can remember, so it does not have a discovery date.
Does game stop take discovery cards?
I'm pretty sure they do. But the card's name is Discover not discovery.
What is a Long journey of exploration and discovery called?
an expedition
