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Francium has about 33 isotopes, whose half-lives range from 215Fr at 86ns up to 223Fr at 21.8m.
As to the 'why', - that is the observed half-life is the answer. It is the rate at which the nucleus disintegrates.
[ Least common multiple of orbital mechanics is my guess. But we have problems even with the three-body experiment. How much more complex is the 200-odd body experiment. ]
The best offer is that certain arrangements of protons and neutrons have interactions such that their stability is limited in time.
With better understanding of sub-atomic particles, clever folk may know the answer in the future.
What else can I help you with?
What is 73 Wh?
73WH is normally used on laptop batteries. In this case 73WH means 73 watt hours. Which shows it is 8 cell or 9 cell battery. 73 watt hours are not actually depict the laptop will last for 73 hours. whereas 1 watt hour is equal to 1 working hour but normally laptops run on average 18-22 watt per hour so in this case 73/20 = 3.65 hours or approximately 3 hours and 40 minutes.
What port does SSH use by default?
SSH Stands for Secure Shell and always run port number 22
What is rob Kardashians age?
22
How wide is each channel on an 802.11b-compliant DSSS system?
22 MHz Each channel is a contiguous band of frequencies 22 MHz wide
How do you write a mmddyyyy date format?
06/22/2008
Why are you unable to buy fluorine or francium in the store?
well i don't know about fluorine, but francium only has a half life of only 22 minutes, witch means in 22 minutes half of it will already be gone, so that's why you can't buy francium.
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
The last member of this group all isotopes of this element are radioactive?
The element that fits this criteria is francium (Fr). All isotopes of francium are radioactive, with the most stable isotope having a half-life of only 22 minutes. Francium is a highly unstable element and is very rare in nature.
Why is francium less cared in chemistry?
Francium is often ignored because it is the second rarest element on the planet. Only about 30 grams of it exist in Earth's crust at any given time. Nobody has been able to have more than a few thousand francium atoms in one place. Francium is also has a very short half-life, 22 minutes. Meaning that if you have a sample of francium half of it will have decayed into other elements after 22 minutes.
Video of francium in water?
Francium is a highly radioactive element with a half-life of only about 22 minutes. There are no known videos of francium reacting with water due to its extreme rarity and short half-life. Additionally, francium is highly reactive, and any contact with water would result in immediate and violent reactions.
How many grams of francium exist in the earth's crust at any one time?
It is estimated that there are around 340 grams of francium in the Earth's crust at any given time. Francium is a highly unstable and rare element, with a half-life of only about 22 minutes, making it very hard to find in nature.
How hard is francium?
Francium is a highly reactive alkali metal that is considered one of the most unstable elements. It is incredibly rare and difficult to obtain due to its radioactivity and short half-life of about 22 minutes.
Why is francuim rare?
Francium is rare because if its incredibly short half-life. The longest-lived isotope of francium has a half-life of 22 minutes. This means that if you have a given mass of francium, half of it will have decayed into something else after a 22 minute period. Francium is itself a product of Radioactive decay, however it decays so quickly after forming that there is never a large amount of it.
Why was francium made?
Francium occurs in nature (in very, very small quantities) as a decay product of other radioactive materials. "Why" is kind of a pointless question: it just is. it is extremely ephemeral. The longest half-life of any isotope of Francium is 22 minutes.
How easy is it to cut francium?
Francium is extremely unstable. The most stable isotope of francium has a half-life of only about 22 minutes. Other isotopes of francium have half-lives measured in microseconds. Scientists predict there is less than one ounce of francium in Earth's crust at any one time. Because of this instablilty, it would be much easier to go get a cup of coffee and wait for francium to cut itself apart.
Why did it take 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 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.
