Radium-226 is a common isotope on Earth, but it has a half-life of about 1600 years. Given that Earth is some 5 billion years old, why is there any radium left at all?

Q: The radioactive isotope (1Os) has a half-life of 22.1 hours. How much of 49.5 g of this isotope will…

A: If initial quantity is N0 and after t time the quantity is N then…

Q: Carbon-14 decays into Nitrogen-14 emitting β particles and has a half-life of 5,730 years. This is…

A: The Radioactive decay follows the first-order kinetics. In this, the rate of decay is proportional…

Q: Why is carbon dating ineffective in finding the ages of dinosaur bones?

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Q: hat atomic number, mass number, and element results when a Radon-222 atom emits a gamma ray through…

A: As we know that the atomic number of Radon is 86 and mass number is 222.

Q: A radioactive material requires short time to decay completely naturally.Is it true or false?

A: The phenomenon of continuous emission of radiation like alpha, beta, gamma, X-rays, etc. from a…

Q: A radioactive source consists of 6.4 x 10^11 atoms of a nuclide of a half-life of 2 days. A second…

A: According to question we need to find--- After how many days will the number of radioactive atoms…

Q: what is the difference between radioactivity and decay?

A: The difference between Radioactivity and Decay is as follows -  Radioactivity - Radioactivity means…

Q: 3. Tungesten-184 emits an alpha particle and the new nucleus formed is: Rehinuim-188 Iridium-184 O…

A: If an alpha particle is formed, the mass of the parent element decreases by 4. Hence, 184 must be…

Q: If you make an account of 1000 people born in the year 2000 and find that half of them are still…

A: An account of 1000 people are made in 2000 and half of them are still alive in 2060. But this does…

Q: If Nitrogen-14 absorbs a neutron and then emits a Hydrogen-1, what nuclues is formed?

A: The given atom is a nitrogen-14 atom.   The reaction of a Nitrogen-14 with a neutron can be…

Q: After 32 days, only 1/16 of a radioactive sample remains. What is the half-life of this sample?…

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Q: One half-life of an isotope is 22 years. How many years would it take to have only 25% of the…

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Q: If two grams of a radioactive isotope has a half - life of twenty hours, the half life of one gram…

A: half life of two grams of a radioactive isotope = 20 hours

Q: How is a strong nuclear force is transmitted between a proton and neutron?

A: Nuclear force: Nuclear force is one of the fundamental interaction. It is the strongest of all.…

Q: A radioactive nuclide that has an atomic number of 53 and a mass (nucleon) number of 131 is used to…

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Q: If you start out with 20 grams of a radioactive material, and 4 hours later you have 5 grams of that…

A: Given data:  Initial amount of material (N0) = 20 g Time (t) = 4 hours Remaining amount of material…

Q: An isotope has a half-life of 3 days. What percent of the original material will be left after: a) 6…

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Q: are radioactivity and radioactive decay the same concepts?

A: Radioactivity is the process by which an unstable  atomic nucleus loses energy by emitting…

Q: After 2 hours, 1/16 of the initial amount of of certain radioactive isotope remains undecayed. The…

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Q: The activity of a radioactive sample decreases exponentially as the time goes on.

A: Radioactivity of a sample is given as, Where A0 is the initial activity, lambda is the half life…

Q: An isotope of iodine 1311, which has an eight-day half-life, is used in nuclear medicine. A sample…

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Q: How is radioactive emission different from radioactivity and radioactive decay?

A: Radiation is a broad term that encompasses all types of energy output and transmission, including…

Q: Suppose a radioactive material, UPinium, was found under the chemistry building in 2000 (year). In…

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Q: If carbon-14 underwent beta decay, what is the resulting nucleus?

A: Beta decay:  A element which undergoes beta decay then the neutron of the atom gets converted to…

Q: Suppose you have a 1 g sample of 226Ra, half-life 1600 years. How long will it be until only 0.1 g…

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Q: If U-238 splits into two even pieces, and each piece emits an alpha particle, what elements are…

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Q: Which expression correctly describes the radioactive decay of a substance whose half-life is T?…

A: To choose correct expression that describes the radioactive decay of a  substance whose half life is…

Q: Which element's isotope is often used to treat cancer patients?

A: The correct option is cobalt Cobalt therapy or cobalt -60 therapy is the medical use of gamma rays…

Q: After three half lives have gone by, what fraction of a sample of a radioactive isotope remains?

A: A half-life is a time period during which nuclei of radio-active sample becomes half of its initial…

Q: Which describes radioactive decay of a substance?

A: Which describes radioactive decay of a substance.

Q: A sample of Uranium ore is estimated to have originally contained 805 mg of uranium-238. Analysis…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: The half-life of a radioisotope O indicates how tightly the nucleons are bound together O determines…

A: The half life of radioisotope is defined as the the amount of time taken for 50% of the original…

Q: The isotope cesium-137, which has a half-life of 30 years, is a product of nuclear power plants.…

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Q: Suppose that you are given a 200 gram sample of a radioactive substance with a half-life of 45 days.…

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Q: If 10% of a radioactive material decays in 5 days, then the amount of the original material left…

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Q: Only 85% of the initial amount of a certain radioactive material following exponential decay remains…

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Q: 47 - 48. A radioactive substance has a half-life of approximately 10 years. If 25 g of the material…

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Q: Radium-226, the first radioactive isotope used for its radioactive properties, has a half life of…

A: Radium-226 has a half-life, T12=23.0 centuries. The value of the rate constant is given by: λ=ln2T12…

Q: The radioactive glucose used in PET scans has a half-life of approximately 2 hours. How much of the…

A: Half life (t) of radioactive glucose= 2 hours Time period (T) = 8 hours Let the original amount of…

Q: You are experimenting with a radioactive sample of polonium. At the end of 14.0 minutes, exactly…

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Q: The half life of radium is 1.62x10^3years. What fraction of radium would remain after 1.0x10^3years?…

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Q: If a sample contains 20g of an isotope that has a half life of 1000 years. How much will be left…

A: Given data:  Initial amount of sample (N0) = 20 g Half life (T1/2) = 1000 years Required: Remaining…

Q: What is the half-life of Ra-226?

A: The time in which the activity of the radioactive substance becomes half is called half life.

Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.