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It is highly unstable. The MOST stable isotope of this stuff has a half life of 22 minutes.
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When is francium a gas?
At a temperature over 677 0C francium may be a gas.
Why did it take over 80 years to discover francium?
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 fish can live to be over eighty years old?
no fish can live that long not even whales
What did early humans discover over thousandsof years?
The early humans discovered and started to use fire some 500,000 years ago. It took hundreds of thousand years to discover how to make fire.
What can the fraction twenty over eighty be reduced in to?
The fraction twenty over eighty can be simplified to become one fourth.
How did scientist discover the periodic table over the years?
Please see this article for more details.
When was tin discover?
Tin is one of the earliest known metals and is over 5550 years old.
How have fairies changed over the years?
They have been around for millions of years. They dont like when humans discover them. But fairies are real!!
What is negative one and eighty over eighty nine as a decimal?
-180/89 = -169/89 = -1.899 approx.
Who discover the marijuana?
Marijuana has been used for over 2,700 years. That's older than the bible. Nobody knows.
What is forty five over a hundred an eighty?
80
What is fifty-one over eighty as a decimal?
0.6375
