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Why did francium take so long to discover?


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Answered 2011-03-09 12:41:15
Answered By Dan Sorensenbecause francium is one of the rarest natural elements

Marguerite Perey discovered francium in 1939. Francium was the last element discovered in nature, rather than synthesized. Outside the laboratory, francium is extremely rare, with trace amounts found in uranium and thorium ores, where the isotope francium-223 is continually formed and continually decays. Perhaps an ounce exists at any given time throughout the Earth's crust; the other isotopes are entirely synthetic. It is also one of the few elements with the ability to run away from scientests using electron legs. The largest amount ever collected of any isotope was a cluster of 10,000 atoms (of francium-210) created as an ultracold gas at Stony Brook in 1996
Source(s): Wikipedia ;)
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Why was francium so hard to discover?

Francium exist only in very infinitesimal concentrations in uranium ores: it is extremely difficult to identify francium surely.


All alkali metals except francium had been disconerd by 1860 why did it take scientists another 80 years to find francium?

Francium is the second rarest element on earth so that's probably why it took a little longer to discover.


Why was francium hard to discover?

because it only has a half life of 22 minutes so by the time any one could get to it the francium had died


All of the alkali metals except francium were discovered by 1860. Why did it take scientists nearly another 80 years to discover francium?

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)


Why did it take so long to discover the neutron?

it took so long to discover the nucleus because we didn't have a microscope strong enough to see it


Why did it take scientist nearly 80 years to discover francuim?

The reason it toke so long to discover because it is a unstable element The reason it toke so long to discover because it is a unstable element The reason it toke so long to discover because it is a unstable element


Why did it take so long to discover Uranus?

Uranus was really dim and it had a slow orbit that is why it took so long.


Did francium's radioactivity play a part in why it took so long to discover?

Francium is a radioactive chemical element; the most known and stable isotope, 223Fr, has a half life of only 21,8 min. It is difficult in this case for francium to accumulate in the earth crust; the total quantity of francium in the earth crust is only ca. 30 g !


Why did it take so long to discover Fancium?

because franicum is soooo reactive


Why did it take so long to discover noble gases with in earths atmosphere?

It took a long time to discover the noble gases because they do not react in basic reactions.


Why did it take scientist so long 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.


Why did take scientists so long 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.


Why did it take scientists so long 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.


Why did scientists take so long 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.


Why did it take so long 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.


Why did it take scientists so long to discover the noble gases?

It took them so long because it isn't easy to discover a colorless, odorless gas. It's even harder when the gas rarely reacts.and because they were quite stupid


Why did it take scientists nearly another 80 years to dicover Francium?

cause i needed a big pis and then got tired it was my fault it took so long [[[[:)


Why does francium react so much?

The chemistry of francium is practically unknown.


What is francium made out of?

As francium is a chemical element, it is made up of protons, neutrons and electrons.


Why did it take eighty years longer to discover francium than all the other alkali metals?

I'm doing homework on francium for my school the question is... The last element to be discovered had to wait until something else was discovered. What was this? So there had to be something else discovered before it was discovered but i don't know what that other something is help... my homeworkd due in tomorrow.


Why did Pluto take so long to be discovered?

It took a very long time to discover the planet Pluto mainly as it is a small one and it is also the last planet of the nine from the sun, and a very powerful telescope was needed to discover it.


How much is francium per gram?

Francium is so rare its unable to be bought


Why did it take so lon for scientists 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.


Why did it take scientists nearly another 80 years so 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.


Is francium reactive?

Francium is not reactive as it is a very weak and small substance of an atom in the element. Francium is used useless things, so therefore it is not reactive.