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Answered 2010-03-22 22:24:45

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.

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Why did it take 80 years longer to descover francium the all the other alkali metals?

The total amount of the francium in the Earth crust is approx. 30 grams.


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 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.


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.


Francium 80 years?

Francium was discovered by Marguerite Perey in 1939.


Why scientists francium 80 years?

Francium was discovered by Marguerite Perey in 1939.


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

Back then they did not know what radioactivity was There wasn't the right equipment to discover it at the time It comes from Uranium, which doesn't last for that long...it has a half life of 21 minutes Very rare, 30g in the world at one time


When was the discovery of Francium?

Francium was discovered in 1939 by French chemist Marguerite Perey. Francium is one of the rarest elements found on the earths surface and there is less than an ounce of it in the earths crust, therefore, this made it hard for Francium to be discovered, and was finally discovered 80 years after all of the others.


Why francium was not discovered until 80 years after alkali metals?

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.


All the alkali metals except francium had been discovered by 1860 why did it take another 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.


All of the alkali metals except francium had been discovered by 1860why did it take scientists nearly another 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.


Why was francium not discovered until 80 years later than the rest of the alkali metals?

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.


Alkali metals except francium had been discovered by 1860 why did it take scientists another 80 years to discover fransium?

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.


All the alkali metals except francuim had been discovered by 1860 Why did it take scientists nearly another 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.


Why was francium discovered 80 years after the other group one elements?

The total amount of the francium in the Earth crust is approx. 30 grams.


Why did it take 80 years longer to discover francium after all the other alkali metals?

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 new elements were discovered?

Take a look at a periodic table. All elements after Uranium were discovered fairly recently, within the last 100 years or so. Some others, such as Technetium and Francium, were also discovered in that time.Take a look at a periodic table. All elements after Uranium were discovered fairly recently, within the last 100 years or so. Some others, such as Technetium and Francium, were also discovered in that time.Take a look at a periodic table. All elements after Uranium were discovered fairly recently, within the last 100 years or so. Some others, such as Technetium and Francium, were also discovered in that time.Take a look at a periodic table. All elements after Uranium were discovered fairly recently, within the last 100 years or so. Some others, such as Technetium and Francium, were also discovered in that time.


Why was francium discovered 80 years after other alkali?

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 80 years longer to discover francium rthan the other alkali metals?

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 another 80 years to discover francium after all the other alkali metals?

Francium is a very unstable element it is estimated that only about 30 grams exist in the earth's crust. Scientists knew that an element like Francium should exist but had yet to find it. It was found in very small amount in uranium ore (only a few atoms) noticed by it's distinct radiation as the most stable isotope has a half-life of on 22 minutes.


When was metal discovered?

Metal was discovered around 9000 years ago. Currently there are around 86 known metals. Iron was discovered around 3000 years ago.


How much francium is in the earth's crust?

[I just had the misfortune of having to write an essay on Francium, for my GCSEs, so i decided to give some information on it to other people who need it for these kinds of circumstances.]There is no more than one ounce of Francium in the Earths crust at any one time. In fact, unlike other alkali metals, it was not 'stumbled upon'. It took many years and a lot of studying to work out that there must be another group one element with a higher reactivity than Caesium. It is not possible to do any tests on Francium as it has a half life of 22 minutes but we can work out most things about it by looking at the other Group 1 metals....x...Prisca Zia...x...


When was tin discovered?

Tin is one of the earliest known metals and is over 5550 years old.


Why did Francium take another 80 years to be discovered?

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 takes scientists nearly another 80 years to discovered 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.