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In general, those would be the substances that have the shortest half-life. There are lots of isotopes that decay in less than a second; in some cases, the half-life can be a millionth of a second, a billionth of a second, or even less. You can find some information about such isotopes in the Wikipedia article on "Nuclide".
What else can I help you with?
What is the most common units used to express the activity of a radioactive substance?
The most common unit used to express the activity of a radioactive substance is the Becquerel (Bq). One Becquerel is equal to one radioactive decay per second.
What is the difference between a non-radioactive substance and a radioactive substance?
Radioactive substances are unstable as a result of the extra neutrons present in the nuclei of the substance. Non-radioactive substances are stable.
What affect the half life of a radioactive substance A the mass of the substance B the temperature of the substance C the addition of a catalyst D the type?
A. The half-life of a radioactive substance is determined by the specific decay process of that substance, so it is not affected by the mass of the substance or the temperature. B. The mass of the substance does not affect the half-life of a radioactive substance. C. The addition of a catalyst does not affect the half-life of a radioactive substance. D. The type of radioactive substance directly determines its half-life, as different substances undergo radioactive decay at varying rates.
Is radioactive waste a pure substance or a mixture?
Radioactive waste is nearly always a mixture but it is possible to be a pure substance.
What is a radio substance?
A radioactive substance emit nuclear radiations.
Is plutonium a radioactive substance?
Yes
What is the most radioactive rock in the world?
Uraninite, also known as pitchblende, is one of the most radioactive rocks in the world. It is a uranium ore that can contain high concentrations of radioactive elements such as uranium and radium.
Is Pm a radioactive substance?
Pm is Prometheum. All isotopes of this element are radioactive.
Can anyone give you an example of a radioactive substance?
H3, Deuterium is radioactive. Uranium and plutonium are radioactive and are used in atomic bombs.
How can one determine the decay constant of a radioactive substance?
To determine the decay constant of a radioactive substance, one can measure the rate at which the substance decays over time. By analyzing the amount of radioactive material remaining at different time intervals, scientists can calculate the decay constant, which is a measure of how quickly the substance decays.
What is the name of the average time needed for half The nuclei and a sample of radioactive substance to undergo radioactive DS our B radioactive substance to undergo radioactive decay?
The average time needed for half of the nuclei in a sample of a radioactive substance to undergo radioactive decay is called the "half-life." This period is a characteristic property of each radioactive isotope and varies significantly between different substances. During one half-life, the quantity of the radioactive material reduces to half of its original amount.
What is a beta emitter?
In physics, an alpha emitter is a radioactive substance which decays by emitting alpha particles.
