Extremely rare, approx. 30 g in the earth crust.
- The total quantity of francium in the earth crust is approx. 30 g. - The most stable isotope of francium, 223Fr, has a half life of only 21,8 min. - Obtaining francium artificially by the intermediate of nuclear reactions, is also very difficult and expensive.
Not known today but probably francium don't burn.
Francium has not applications and the oxide cannot be prepared.
Francium is a metal.
Francium was named after France, the country it was dicovered in.
The chemistry of francium is not known; francium has properties similar to caesium.
We haven't sufficient francium for a measurement; also francium is autovaporized.
As francium is a chemical element, it is made up of protons, neutrons and electrons.
Francium is a radioacive chemical element; francium is natural but also may be prepared in laboratory.
Francium is not a commercial product.
Francium is not a commercial product.
Francium has any use.