0
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 else can I help you with?
Why did it take another eighty years to discover francium from 1860?
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.
When did Eighty Years' War happen?
Eighty Years' War happened in 1568.
What number has all letters in reverse alphabetical order when spelled out?
Eight is the only single digit number to be spelled with all of its letters in alphabetical order. Eighty is another such number, but it is two digits. I'm not sure if there are others.
How many people died in eighty year war?
The Eighty Year War, also known as The Dutch Revolt (1568-1648) has an estimated death toll of 1,000,000.Please see related links below!
How old is the queen 2010?
Eighty-four - having been born in April 1926.
Why did it take scientists nearly another eighty years more to discover francium?
The total amount of the francium in the Earth crust is approx. 30 grams.
Why did it take over eighty years to discover Francium?
It is highly unstable. The MOST stable isotope of this stuff has a half life of 22 minutes.
What is the eighty seventh element in the periodic table of the elements?
Francium
Why did it take another eighty years to discover francium from 1860?
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 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.
Scientists have divided the sky into how many constellation?
eighty-eight constellation
What is another word for eighty?
Old Octogenarian
What is another way to say 80's in word form?
"Eighty is".
What is another way to write 84?
Eighty-four Or 80 (plus sign) 4
How do you spell 80 in word form?
The ordinal number 80th is spelled eightieth.I swear this is the eightieth time I've had to help someone spell a word today.
How do you write 80 dollars in words?
Eighty dollars.
How do you spell eighty one?
I spell it as eighty-one.
