One in 6500 water molecules contains a deuterium atom. If all the deuterium could be extracted from 1 cubic meter of water and then reacted, how much energy could be obtained?

Q: A radioactive sample has a half-life of 10 minutes. What fraction of the sample is left after 40…

A:

Q: An element loses 22% of its mass every year, what is the half life?

A: Let the original mass of element be No and it loses 22% of mass its mass in a t=365 days i.e.,…

Q: One of the radioactive nuclides formed in nuclear power plants is hydrogen-3, called tritium, which…

A: According to theroy of Radioactivitythe decay rate of a nuclei which has initially N0 nuclei  at any…

Q: The half-life of uranium-234 is approximately 25,000 years. How many undecayed nuclei remain after…

A: number of uranium atoms = 2.7 billion = 2.7×109 atoms half life of uranium = 25000 years =…

Q: Q6: 100 g of radioactive element X are placed in a sealed box. The half-life of this isotope of X is…

A: Disclaimer: Since you have posted two questions and no specific question number is mentioned, we…

Q: When a nucleus of emits an alpha particle, what are the atomic number and the atomic mass of the…

A: In alpha decay, an unstable nucleus will emit an alpha particle, which is a helium nucleus composed…

Q: A nuclear fission reactor uses nuclear reactions, of which the following is typical: *? +6? → ? + Te…

A:

Q: How many alpha particles are emitted per second from 1 microgram of radium?

A: we know that,  1C= Activity of 1 g of Radium=3.7×1010 days

Q: A certain five cent coin contains 5.00 g of nickel. What fraction of the nickel atoms’ electrons,…

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Q: The half-life of radium-226 is 1600 years. How long will it take for 10.0 mg of radium-226 to decay…

A: Using half life concept to solve the problem

Q: A sample containing 1 gram of Radium-224 was stored in laboratory 100 years ago. Now the sample…

A: Given data: The mass of Radium-224 at 100 years ago is m0=1 g. The mass of Radium-224 at now is…

Q: A 85.0-kg person is exposed to 389 rad of radiation. How many joules did this person absorb?

A: Given, Exposed radiation= 389 rad 1J/kg = 100 rad Mass (M)=85 kg Total energy absorbed (T.E)=? We…

Q: What element results if two protons and two neutrons are ejected from a radium nucleus?

A: The remaining nucleus is that of Radon with atomic number 86.The transformation of one nucleus of…

Q: The half-life of scandium-46 is 83.9 days. How much of a 9.0–oz sample of scandium-46 will remain…

A: Given data The half-life of the scandium-46 is t1/2 = 83.9 days. The initial amount of the…

Q: A quantity of a radioactive element gives 1,200 alpha particles every 60 seconds, and after 120…

A:

Q: A sample of polonium-208 has a half-life of 2.898 years. What percent of polonium-208 remains after…

A: The half-life of a radioactive substance is the time required for a quantity to reduce to half of…

Q: The initial amount of carbon-14 is 100 g and the amount of carbon-14 dropped to 1 g after decay…

A: N=N0e-λtt=1λlnN0N=t1/20.693lnN0N

Q: Iodine-131 has a half-life of 8 hours. If a solution containing 5 grams of iodine-131 is injected…

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Q: A radioactive source has a half-life of 80 s. How long will it take for 7/8 of the source to decay?

A: Given, the half life a radioactive source =80 s we have to calculate the time for 7/8 of the source…

Q: The activity of a radioactive element falls from 600 s1 to 500 s1 in 40 minutes. The half-life of…

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Q: How many neutrons are in uranium-235?

A: The number of protons equals the atomic number. The number of protons and neutrons together…

Q: If you know that the natural element samarium (its mass number 146) contains the radioactive isotope…

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Q: A clinical technician finds that the activity of a sodium-24 sample is 1,024 cpm. What will be the…

A: Half life is defined as the time required for the radioactivity of a radioactive element to drop to…

Q: how much energy (in Joules) is released by Helium -4 during a nuclear reaction?

A: Given: Helium-4  Asked to find energy released during a nuclear reaction.

Q: The half-life of Unobtanium-118 is 3 days. How many days pass for 800 grams of this element to be…

A:

Q: number of alpha-decays of Q in the first one hour is;

A: Given: Determine number of alpha decays of Q in the first one hour ?Where,   A heavy nucleous Q of…

Q: f the half-life of cesium-137 is 30 years, approximately how much time will be required to reduce a…

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Q: If the half-life of an isotope is two years, what fraction of the isotope remains after six years

A: Amount of radioactive material after time t is given by: N = N0*exp(-lambda*t) lambda = decay…

Q: A radioactive isotope has a half-life of 51.5 days. What fraction of the isotope remains after 413…

A: We have: The half-life is t1/2=51.5 days Calculating the first-order reaction constant k as…

Q: The half-life of Uranium-237 is 5.83 x 105 If you have a sample with 5.89 x 1024 atoms in it, how…

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Q: To say whether an atom is an isotope of an element, the number of protons and electrons must be…

A: Required : The correct option.

Q: Suppose you are designing a proton decay experiment and you can detect 50 percent of the proton…

A: In a proton decay experiment 50 percent of proton decay in a tank of water is detect.

Q: The half life of 85Kr is 11 years. What is the mass of one millicurie of 85Kr? O 9.2 microgram O 30…

A: Given  Half life = 11year  T½= 11*365*24*60*60 sec =3.48*10⁸ sec I millicurie = 3.7*10⁷ /s  Lambda=…

Q: A sample of a radioactive element has a half-life of 180 days; what percent of this sample will…

A: The decay constant of a radioactive sample is given by :  The amount of sample left after 't' time…

Q: When the plutonium bomb was tested in New Mexico in 1945, approximately 1 gram of matter was…

A: According to Einstein principle Energy equals mass times the speed of light squared. E = mc2    =…

Q: Substance X has a half-life of 10 years, if you start with 1000 grams, how much will be left after…

A: Given data:  Half life (t1/2)= 10 years Initial quantity (N0) = 1000 grams  Time (t)  = 100 years…

Q: If the half life of an element is 32.2 years, how many years it take for a sample to decay to the…

A:

Q: Carbon 14, with a half-life of 5700 years, is used to estimate the age of organic materials. What…

A: The expression for the half-life of carbon-14 is written as, Here, λ represents the decay constant…

Q: Iodine-131, a beta emitter, has a half-life of 8 days. A 7-gram sample of initially pure iodine-131…

A: Half life = 8 days initial mass = 7 grams 1) After 1 half life , that is after 8 days mass left =…

Q: A silver coin has a mass of 17.75 g. If the atomic mass of silver is 107.868 u, how many silver…

A: mass = 17.75 g Atomic mass of silver = 107.868 u Number of moles of silver present in the coin =…

Q: If the element Europium is 276 grams then how many atoms would it have?

A: Natoms=NAvamMmolar

Q: The initial amount of carbon-14 is 100 g and the amount of carbon-14 dropped to 1 g after decay…

A: Given, Initial mass (mo) =100g Final mass (m) = 1g half life (t1/2) =5730 years

Nuclear Reactions

Nuclear reactions are processes in which the fundamental characteristics of a nucleus changes. They change into a completely different nucleus. These processes occur naturally in an unstable nucleus. Bombarding an energetic particle can induce nuclear reactions.  In this article, both the naturally occurring nuclear reactions are termed as radioactive decay and the induced nuclear reactions are further categorized as nuclear fission and nuclear fusion.