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Because each amount is halved over the time it takes for the half life process
for instance A Isotope has a half life of 20 years
If it starts off with 12,000
then in 20 years it'll be 6,000 (halfed)
another 20 years it'll be 3,000
so no matter how much there are, it will always decrease by half
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∙ 13y ago
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How many isotopes of polonium are part of the decay?
Each isotope has a specific radioactive decay.
What isotopes accumulate in old uranium-bearing rock?
Ultimately lead, as it is the only element in the uranium decay chains with isotopes that are stable. Specifically the isotopes 206, 207, and 208; each of which is the end of a different decay chain.
Are isotopes stable?
No. They are not. They undergo nuclear decay at a specific rate for each different isotope.
What is stable and unstable isotopes?
Some isotopes are stable, others are unstable.
When californium decays into Cm what is formed?
Each isotope has another type of decay but generally from californium are formed curium isotopes and an alpha particle.
How many isotopes of polonium are part of the decay?
Each isotope has a specific radioactive decay.
What isotopes accumulate in old uranium-bearing rock?
Ultimately lead, as it is the only element in the uranium decay chains with isotopes that are stable. Specifically the isotopes 206, 207, and 208; each of which is the end of a different decay chain.
Is it true that the half-life of a radioactive isotope decreases as the isotopes decay?
no, halflife is a constant for each isotope's decay process.
Are isotopes stable?
No. They are not. They undergo nuclear decay at a specific rate for each different isotope.
What is stable and unstable isotopes?
Some isotopes are stable, others are unstable.
Can nuclear decay occur in atoms of oxygen?
It sure can; basically, each element has radioactive isotopes. Check the Wikipedia article "isotopes of oxygen" for more details.
When californium decays into Cm what is formed?
Each isotope has another type of decay but generally from californium are formed curium isotopes and an alpha particle.
Do all elements decay over time?
It is the unstable isotopes of elements that decay over time. All elements have an isotope or isotopes that are unstable and will decay over time. (These isotopes will be either naturally occurring or will be synthetic.) Some isotopes of some elements, however, are stable, and they will not undergo radioactive decay.To discover what's what, we have to do some homework, and what better place to start than the table of nuclides? It lists all the elemets, and all the isotopes of each element. Further, it tells us which ones are stable, which are unstable, and will also help us determine the decay mode of the unstable nuclides.
Why cant you add the average masses of each of the isotopes and divide to get overall average of the atoms?
Because the isotopes do not appear in equal amounts. This is hardly surprising since many isotopes experience radioactive decay and change to other elements after decay while stable isotopes persist - thus stable isotopes will usually dominate as the most common isotopes for individual elements with those with the longest half-lifes being more common than those with shorter half-lifes. Of course when you get into the heaviest elements there don't seem to be any stable isotopes so those with longest half life dominate.
Does the element aluminum undergo radioactive decay?
All elements have some isotopes that undergo radioactive decay, the question is how fast.Aluminum comes in three major isotopes, each with their own half-life:Al-26: 730000 years - 0% in natural aluminumAl-27: Stable - 100% in natural aluminumAl-28: 2.3 minutes - 0% in natural aluminumSo as natural aluminum is 100% Al-27 it does not undergo radioactive decay
What is a sentence with successive in it?
Successive farming is helpful to the enviroment.With each successive boyfriend, her choices improve because she learns from her mistakes.
Can you identify atoms that will undergo radioactive decay in half -life period?
Yes and no. Each radioisotope has a distinct half-life so, if you can measure the half-life, you can probably identify the isotope. The problem is that most isotopes decay to other isotopes that are also radioactive, and they have their own half-life, so you must differentiate which isotope you are looking at when you count its decay events in a detector. If the decay event is a gamma event, it is relatively straightforward to differentiate, but if it is beta, it is difficult, though not impossible, because the output energy is a spectrum, and not a single photopeak.
