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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 do you call someone who is over eighty years old?
Someone who is over eighty years old is often referred to as an "octogenarian." This term specifically denotes individuals in the age range of 80 to 89 years old. In more general contexts, they may simply be referred to as elderly or senior citizens.
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 sover eighty?
"Sover eighty" seems to be a typographical error or a misinterpretation. If you meant "over eighty," it typically refers to individuals who are 80 years old or older. This demographic may have specific health, social, and economic needs due to aging. If you meant something else, please provide more context for clarification.
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.
