Polonium 209 (Po-209) has a half life of 103 years. How long would it take a 100-g sample to decay so that only 3.1 g of Po-209 was left?

Q: If you accidentally spill phosphorus-32 onto your shoe, how long would it take before 99.9% of the…

A:

Q: Barium-142 is an beta emitter with a half-life of 11.0 min. If we start with 2.500 g of 142Ba, what…

A: The number of half-lives (n) can be calculated as

Q: The Br-82 nucleus has a half-life of 1.0 x 103 min. If you wanted 1.0 g Br-82 and the delivery time…

A: The radioactive decay of Br-82 is an example of first order reaction. The rate constant of the…

Q: If the half-life of 100.0 grams of a radioactive isotope is 8 years, how many grams will remain in…

A:

Q: A 1.55 g sample of an isotope has a half-life of 3.8 days. What mass of sample is left after 5.5…

A: given data,sample of an isotope or initial amount of sample =1.55 g sample half life =3.8…

Q: How much time in minutes would it take for a 2.301 g sample of 3H to decay to a mass of 1.789 g if…

A: The initial concentration (N0), final concentration (N), and time (t) required to convert the…

Q: The radioactive nuclide has a half-life of 5.27 years. Calculate the mass of that remains from…

A: The amount of time that passes is a whole number multiple of the radioactive nuclide half-life.…

Q: What type of decay occurs with the transformation of Th-234 to Ra-230?

A: The type of decay occurs with the transformation of Th-234 to Ra-230 has to be given.

Q: 222Rn has a half-life of 3.82 days. If a sample contains 36.2 mg of 222Rn, what mass of the isotope…

A: We have to calculate the amount after 6.81 days.

Q: 231y The isotope 23 Pa undergoes a series of a and 8 decays, ending up as 20 Pb. Overall during this…

A:

Q: Consider a certain type of nucleus that has a half-life of 32 min. Calculate the time required for…

A:

Q: The half-life of protactinium-231 is 3.25 x 104 years. How long will it take for 43.4 grams of…

A: Find out the time period by using the formula, Where,              Ao = Initial amount  At = Amount…

Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…

A: Given -> Half life = 3.82 days

Q: Krypton-85 has a half life of 10 years. Approximately what percentage of Kr-85 produced from the…

A:

Q: Potassium 40 has a half life of 1.3 billion years.  If no half lives had passed, what percentage of…

A: A numerical problem based on half life period, which is to be accomplished.

Q: 2. The half-life of radon-222 is 3.8 days. How much of a 100 gram sample is left after 15.2 days?

A: Given data contains, The half-life of radon-222 is 3.8 days. Mass of sample left after 15.2 days is…

Q: What is the particle emitted when plutonium-244 decays into americium-244?

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Q: A radioactive isotope has a half-life of 12.0 seconds. How much of a 100 gram sample is left after…

A: Given  Initial Mass of Sample ( A)0  = 100 gram  Half life time ( t1/2)   = 12 sec  Time ( t ) = 36…

Q: In the next step of the neptunium-237 decay series, very unstable francium-221 is produced.  Given…

A: Here we are required to find the amount of Francium 221 remain after 7.32 minutes.

Q: For the nuclear reaction 239 94 ° Pu + U+ ?, 235 92 what is the missing particle? OHe He Submit

A: Balancing nuclear reactions :-  In case of nuclear reactions    sum of atomic numbers of Reactants =…

Q: The half life of bismuth-213 is 46 minutes.  How much of a 20 g sample of bismuth-213 is left after…

A: The unstable nucleus or isotope undergoes radioactive decay to form a stable nucleus. This process…

Q: The half–life of a radioactive material is 7.04 days. Assuming you start with a 1.45 mg sample, how…

A: Given , Half life = 7.04 days Time , t = 16 days Initial Weight of sample = 1.45 mg

Q: Can the half-life of a given isotope be manipulated or changed to suit human needs?

A: Answer

Q: Bismuth-209 has a half-life of 2.01 x 1019 years.  How long will it take for 6.92 kg of bismuth-209…

A: We have to predict the time taken.

Q: What daughter isotope is produced during the alpha decay of Uranium-238? Pu-242 Th-234 O Th-236…

A: Given: Uranium 238 To find: daughter isotope produced during the alpha decay of Uranium-238

Q: What is the nuclide when Beryllium-7 undergoes electron capture?

A:

Q: If the half-life of a radioactive isotope is 32 days, how many half-lives must pass before a 3.0…

A: Radioactive decay follows the first-order kinetics. The half-life of the first-order reaction does…

Q: Why do the nuclides that are used as radiotracers have short half-lives?

A: Radionuclide is an atom that possesses excess nuclear energy, which is used in the radioactive decay…

Q: A 60 mg sample of a radioactive nuclide is administered to a patient to obtain an image of her…

A: Given: Half-life = 12 hours Radioactivity follows first-order kinetics. First calculate the rate…

Q: How does half-life relate to radioactive decay?

A: The half-life (t1/2) is the time required by any quantity to reduce half of its initial value.

Q: How much of a 24-gram sample of Radium-226 will remain unchanged at the end of three half-life…

A: 19) Given : Initial mass of radium-226 = 24 g And time passed = 3 half lives.

Q: Of an initial amount of 7000 g of​ lead-210, how much will remain in 180 ​years? Lead-210 decays at…

A: Initial amount of lead-210 = 7000 gm Time = 180 years Decay constant (k) = 3.15 % / year

Q: 145 g sample of radioactive has a half live of 6.4 days how many g of material is left are 2 half…

A: The time required to disintegrate the molecule to half of its initial concentration is called the…

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 3.3 g remain. What is the original…

A: Answer

Q: 233ра 'Pa

A: Radioactive decay series: It is series of radiochemistry in which transformation of one radioactive…

Q: 1. The radioactive nuclide Co has a half-life of 5.27 years. Calculate the mass of Co that remains…

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

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 3.8 g remain. What is the original…

A:

Q: In the thorium decay series, thorium-232 loses a total of 6 α particles and 4 β particles in a…

A: The final isotope is Lead-208.

Q: If a rock contained 12.0 g of 4°K when the earth was formed 4.54 billion years ago and the half-life…

A:

Q: If you have 2.00 grams of a radioisotope, with a half-life of 5 days, how much of the isotope is…

A: Given;

Q: Cobalt-60, with a half-life of 5 years, is used in cancer radiation treatments. If a hospital…

A: Radio active decay of a radioactive nuclide undergo via first order kinetics

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 3.0 g remain. What is the original…

A:

Q: An 80.0 g sample of iodine-131 was placed in a sealed vessel forty days ago. Only 2.5 g of this…

A: Decay reactions are first order reactions. Since we know that the relationship between the amount of…

Q: The half-life of radon-222 is 3.8 days. How much of a 100 gram sample is left after 15.2 days?

A: Half life is the time taken by the original compound to reduce to it's half.

Q: When will a 1.00 g sample of thorium–232 have a mass of 1.00 mg, knowing that the half – life of…

A:

Q: In a 3×109 -year-old rock that originally contained some 238U , which has a half-life of 4.5×109…

A: Since 238U has a half-life of 4.5 × 109 y, it is useful for dating only very old materials, showing,…

Q: Strontium-90 has a half life of 28 years. If a 5.31 mg sample was stored for 112 years, what mass of…

A: Reaction in which rate is linearly depend upon one reactant is known as first order reaction.

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 2.5 g remain. What is the original…

A: Given :-  Amount of sample left after 120 years = 2.5 g  Half-life kf Cs-131 nuclide = 30 years  To…

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.