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What is the equation for beta decay of uranium-237?
The beta decay of uranium-237 can be represented by the equation: (^{237}{92}U \to ^{237}{93}Np + e^- + \bar{\nu_e}) where (^{237}{92}U) decays into (^{237}{93}Np), an electron (e^-), and an electron antineutrino (\bar{\nu_e}).
Is the percentage of radioactive atoms that decay during one half-life always the same?
Yes, the percentage of radioactive atoms that decay during one half-life is always the same, which is 50%. This means that half of the radioactive atoms present will undergo radioactive decay within each half-life duration.
What is the longest radioactive halflife?
First, it isn't very accurate to talk about a radioactive "element"; you should talk about radioactive isotopes. Different isotopes of the same element can have very different behavior in this sense. For example, hydrogen-1 and hydrogen-2 are stable, while hydrogen-3 is not (half-life about 19 years).Individual atoms, in a radioactive isotope, will decay at a random moment. The half-life refers to how long it takes for half of the atoms in a given sample to decay (and convert to some other type of isotope).
How can you say that radioactive decay is random unless you know that the nuclides are identical in the first place?
Radioactive decay is a random event. But we can assess it by statistical analysis of a large number of decay events across time for a given radionuclide. Standard stastical analysis ideas apply. The way we know that it is the radionuclide we specify is that we refine the sample chemically. Then we look at the decay mode. If it is a situation where there is particle emission, we can identify the particle and the energy it comes out at. If its electromagnetic, we can specify an energy associated with the photon. The mode of decay and the energy cast off are the ways we can insure our "count" of the decay events specifically targets the radionuclide we are investigating. That and the applied chemistry we specified to clean up the sample. We're good at this radioactive decay thing. We can count even a very few decay events, and do so accurately across time (though more is better). And because we've done our homework as regards type of decay and energies, we know what it is that is decaying, and how long it is taking to decay. We can arrive at a half-life for a given radionuclide. A link can be found below.
It takes 5.2 minutes for a 1.000 g sample of Fr-210 to decay to 0.250 g What is the half-life of Fr-210?
The half-life of Fr-210 is 5.2 minutes. This is because half of the original sample (1.000 g) decays to 0.500 g in the first half-life and further decays to 0.250 g in the second half-life, which takes a total of 5.2 minutes.
What is the first radioactive element that forms when uranium 238 decays?
The first radioactive element formed when uranium-238 decays is thorium-234. Uranium-238 undergoes alpha decay to form thorium-234.
How fast a radioactive element decays is given by is what?
The decay of a radioactive element is governed by its half-life, which is the time it takes for half of the radioactive atoms in a sample to decay. Different radioactive elements have different half-lives, ranging from microseconds to billions of years. The decay rate is exponential, meaning that the rate of decay decreases over time as the amount of remaining radioactive material decreases.
What kinetics does radioactive decay obey?
Radioactive decay follows first-order kinetics, meaning the rate of decay is proportional to the amount of radioactive material present. This means that half-life remains constant throughout the decay process.
Why radioactive decay is always first order reaction?
This is because only one isotope decay.
What element does radium become once it has decayed?
Radium undergoes radioactive decay, specifically alpha decay, to become radon. Radium-226 (226Ra) will undergo alpha decay releasing that alpha particle, which is a helium-4 nucleus, to become radon-222 (222Rn).
What follows radioactive decay?
The final product is a stable isotope, but what it is depends on the decay. The intermediate steps constitute what is called a decay chain. For example, one well known decay chain is that of thorium-232, which goes through a series of radioactive isotopes decaying each to the next. The final product is lead-208, which stops the process since it is stable and does not decay further. Other decay chains produce other results. Sometimes the first decay produces a stable result, as in the case of tritium, which decays to helium-3.
What is the percentage of radioactive nuclei left after 3 half lives have passed?
12.5%
What is the equation for beta decay of uranium-237?
The beta decay of uranium-237 can be represented by the equation: (^{237}{92}U \to ^{237}{93}Np + e^- + \bar{\nu_e}) where (^{237}{92}U) decays into (^{237}{93}Np), an electron (e^-), and an electron antineutrino (\bar{\nu_e}).
How is a radioactive element's rate of decay?
A radioactive element's rate of decay is characterized by its half-life, which is the time required for half of the radioactive atoms in a sample to decay into a more stable form. This process occurs at a constant rate, unique to each isotope, and is unaffected by external conditions like temperature or pressure. The decay follows an exponential decay model, meaning that as time progresses, the quantity of the radioactive substance decreases rapidly at first and then more slowly.
What is the decay element of uranium?
It is not yet discovered since all of the uranium isotopes are having half life for several millions of years. We would be able to find it after atleast 700 millions of years.
What type of nuclear decay does Uranium undergo?
Uranium has a different decay chain/series for its different isotopes. Uranium 238 for example first decays to thorium 234 through alpha decay while U235 alpha decays to thorium 231. Both have different half lifes which can be found on a natural decay series chart for the said element. The thorium in either case then beta decays to another element.
Is francium a radioactive element?
Francium (Fr) is a natural radioactive element, extremely rare.
