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Is the iodine-131 from the Chernobyl disaster is still a threat to us today?
You can only say, 23 years later, I-131's radioactivity almost decreases to 1/8 of original radioactivity.
Does all nuclear wastes completely disappear after 50 years?
Not by a long shot. The most radioactive isotopes will decay very rapidly and be safe in much less than 50 years (e.g. iodine-131 with a halflife of about 8 days will be gone in less than 2 months), but less radioactive isotopes will decay so slowly they can be around for hundreds of thousand of years (e.g. plutonium-239 with a halflife of 24400 years will be gone in under 200000 years) to longer than the age of the universe (e.g. uranium-238). Slightly oversimplified, the most dangerous isotopes in nuclear waste tend on average to disappear first with less dangerous isotopes persisting for longer periods.
What is the purpose of nuclear decay?
nuclear decay is when the nucleus of an atom is broken apart. because the number of protons has changed, so has the element. this usually happens with large nuclei, which tend to be more unstable (radioactive) than smaller nuclei.
Is the chernobyl disaster still going?
Its not. The Beta particles (Iodine 131 ) emmited from the diaster will have been spread far and wide now and will also have been less concentrated, so therefore the actual Iodine 131 emmited from the diasaster is of relativly low harm to us, about as much harm as backround radiation.
What is more radioactive than pure uranium?
Many radioactive isotopes are more radioactive than the naturally occurring uranium isotopes:All fission product isotopes are more radioactive (e.g. iodine-131, strontium-90)Most radioactive isotopes in the uranium --> lead decay chain are more radioactive (e.g. radium, radon, polonium)Plutonium is more radioactiveTritium is more radioactiveCarbon-14 is more radioactiveArtificially produced uranium isotopes are more radioactive (e.g. uranium-233, uranium-236)etc.
What is the nuclear equation for the decay of iodine?
Here is the equation for the beta minus decay of iodine-131: 53131I => 54131Xe + e- + ve The iodine-131 undergoes a transformation when a down quark within a neutron in its nucleus changes into an up quark. This change is mediated by the weak interaction, or weak force. The neutron then becomes a proton, and an electron is created and ejected from the nucleus along with an antineutrino. To learn more, use the link below to the related question, "What is beta decay?"
How is iodine-131 produced by tellurium?
Iodine-131 is produced through the decay of tellurium-132, which occurs in nuclear reactors as a byproduct of uranium fission. Tellurium-132 undergoes beta decay to transform into iodine-132, which then further decays to iodine-131 through another beta decay process. This transformation is part of the decay chain of certain isotopes produced during the fission of nuclear fuel. Iodine-131 is significant in medical applications, particularly in the treatment of thyroid disorders.
What is the decay mode in iodine-131?
Iodine-131 decays through beta decay by emitting a beta particle and a gamma ray. This process transforms a neutron in the iodine-131 nucleus into a proton, resulting in the formation of xenon-131.
What is the source of iodine-131?
Iodine-131 is a radioactive isotope of iodine that is typically produced in nuclear reactors as a byproduct of nuclear fission. It is commonly used in nuclear medicine for medical imaging and therapy.
What decaying radioisotope produces xenon-131 through beta decay?
Iodine-131 is a decaying radioisotope that produces xenon-131 through beta decay. During beta decay, a neutron is transformed into a proton within the nucleus, and a beta particle (an electron) is emitted, resulting in the production of xenon-131.
What is the structure of iodine-131?
Iodine-131 is a radioactive isotope of iodine with 53 protons and 78 neutrons in its nucleus. It decays by beta decay, emitting beta particles and transforming into xenon-131.
How was Iodine-131 formed?
Both iodine-129 and iodine-131 are produced by the fission of uranium atoms during operation of nuclear reactors and by plutonium (or uranium) in the detonation of nuclear weapons. US EPA Link below.
When an iodine 131 atom decays by emitting a beta particle and a gamma particle it forms?
When an iodine-131 atom decays by emitting a beta particle and a gamma particle, it forms xenon-131. The beta particle is an electron, while the gamma particle is a high-energy photon. This decay process helps iodine-131 become a stable element, xenon-131.
How many days must elapse for a 0.80 Mg sample of iodine-131 in the thyroid to decay to 0.10 Mg?
The time required is 24.06 days. The half life of iodine 131 is 8.02 days.
At sample of 131 I decays to 1.0 grams in 40 days. What was the mass of the original sample?
To determine the original mass of the iodine-131 sample, we can use the radioactive decay formula, which states that the remaining mass can be calculated using the equation ( N(t) = N_0 e^{-\lambda t} ). Given that the sample decays to 1.0 grams in 40 days, and knowing the half-life of iodine-131 is approximately 8 days, we can calculate the decay constant and then find the original mass ( N_0 ). After performing the calculations, the original mass of the iodine-131 sample was approximately 5.6 grams.
How long would it take for iodine-131 to decay into xenon?
The half life of Iodine-131 is 8.02 days, that means that say if you had 1 gram of 131I after approximately 8 days there would be only 0.5g left. The other half would have become Xenon-131. After 6 half lives (~48 days in your case) you would only have 1.6% of the original amount left.
What is iodine-131?
Iodine-131 is a radioactive isotope of the element iodine.
