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a certain radioactive nuclide has a half life of 5.00 hour. Calcuate the decay rate for 1.000 mole o... The radioactive nuclide 18F decays by first order kinetics with a half life of 1.83 hr. How many... the nuclide 232 Th 90 is radioactive. when one of the atoms decays, a series of alpha and beta parti... The nuclide 12 N 7 is unstable. What type of radioactive decay would be expected??? my guess is e... The iodine-131 nuclide has a half-life of 8 days. If you originally have 625-g sample, how many gram... The iodine-131 nuclide has a half-life of 8.0 days. If you originally have a 257 g sample, after 48... The cesium-131 nuclide has a half life of 30 years. After 90 years, about 6g remain. What is the ori... The nuclide 96Nb decays by a first-order process with a rate constant of 2.96 × 10-2 h-1. How long w... a helium nuclide of mass M1 moving with a velocity Vo is incident on a stationary nuclide of mass M2... Nuclide X has decay constant 1.08 h-1. It can decay in 2 branches, to nuclide Y or to nuclide Z: X... When an unstable nuclide emits a gamma ray, there is no change in its . . . a) atomic number b)... You have 180 g of a radioactive substance. It has a half-life of 265 years. After 1,325 years, what... What does radioactive mean??? 32% of a particular radioactive substance disappears in 227 years. Part 1: Find the decay constan... How a radioactive element will decay over time? If 15% of the radioactive material decays in 5 days, what would be the percentage of amount of origi... A radioactive substance has a half-life of 27 years. Find an expression for the amount of the substa... A radioactive element x has half life of 30 days and will decay to become another new element Y..... Iodine-131 is a radioactive isotope. After 8.00 days, 50.2% of the sample remains. What is the half... If 12 % of a radioactive substance decays in 7 hours, what is the half-life of the substance? Car... If a radioactive isotope has a half life of 10 years and you start with 100 grams what is the fracti... What order is the radioactive decay of carbon-14, an unstable isotope of carbon? A. Third order... A radioactive material has a half life of 500 years. A) Given 20 grams of this material, how much w... A particular radioactive element has a half life of 10.0 days. How much is left after 30.0 days if t... A radioactive substance has a half life of 60s.what fraction of the original substance would you exp... Two different radioactive isotopes decay to 10% of their respective original amounts. Isotope A does... A radioactive isotope, used in the agricultural industry has a half life of 8 days. On application,... A 10g sample of radioactive substances is lift to decay for five half-lives. How much of the radioac... A 15-g sample of radioactive iodine decays in such a way that the mass remaining after t days is giv... The radioactive element has a half-life of about 28 years and sometimes contaminates the soil. After... Consider a radioactive sample with a half-life of one week. How much of the original sample will be... A radioactive substance has a half-life of 4 days. Suppose we have 800 mg of this substance. a) Fi... Iodine 131 is a radioactive isotope. After 4.00 days, 70.8% of a sample of 131I remains.What is the... The quantity Q of radioactive carbon remaining in a 200-gram wood sample at time t is given by the e... Which radioactive sample would contain the greatest remaining mass of the radioactive isotope after... If a radioactive sample has an activity of 8.33 Bq, how many disintegrations per second are occurrin... A radioactive isotope has a half life of 8.1 days. If the sample starts with 25 grams, how much will... ``If 18g of a radioactive substance are present initially and 5 yr later only 9 g remain, how much o... If 18g of a radioactive substance are present initially and 5 yr later only 9g remains, how much of... If 80 percent of radioactive element is left after 250 years, then what percent remains after 600 ye... How can radioactive dating help determine the absolute age of a rock (or rock layer)? a certain radioactive substance is decaying so that at time t, measured in years, the amount of the... Radioactivity and Radioactive Decay Quick Check 1. Which of the following transformations is an e... If a radioactive isotope has a half life of 162 days how many half lives would it need to go through... Iodine-131 is a radioactive isotope used in the treatment of thyroid conditions. It has a half-life... A certain radioactive material is known to decay at a rate proportional to the amount present. A bl... OBronium-12 is a radioactive material that spontaneously decays when it comes in contact with oxygen... 200 mg of a radioactive substance decays at a rate of 5% per day. A) Write an equation that model... Scientists used radioactive hydrogen to make water. They grew plants using the radioactive water. Wh... A certain radioactive substance has a half of 30 minutes. If the count rate was observed to be 300 a... Scientists used radioactive hydrogen to make water. They grew plants using the radioactive water. Wh... if 17 percent of a radioactive substance decays in 12 hours, what is the half-life of the substance... The activity of radioactive source falls to one sixteenth of originally value in 32 minutes.what is... A radioactive isotope has a decay constant of 9.68E-03 /s. Calculate the time taken for three quarte... If 50% of a radioactive element remains after 4000 years, what is the half-life? a 1 half-life... Scientists used radioactive hydrogen to make water. The scientists grew plants using the radioacti... If 50% of a radioactive element remains after 4000 years, what is the half-life? 1,2,3, or 4 half-li... does radioactive dating have to do with absolute dating? Plutonium-239 is a radioactive isotope frequently employed as nuclear reactor fuel, with a half- lif... What impact did radioactive decay have on the formation of earth? Choose one word from each set to c... A radioactive isotope has a decay constant of 10^-6( ten rise to power negative six).Calculate it's... If 70% of a radioactive element remains radioactive after 400 million years , then what percent rema... The quantity Q of radioactive carbon remaining in a 300 - gram wood sample at time t is given by the... A certain radioactive nucleus emits a gamma ray with an energy of 0.186 MeV. Calculate the mass los... Some radioactive nuclides have very short half-lives, for example, I-31 has a half-life of approxi... Radioactive​ uranium-235 has a​ half-life of about 700 million years. Suppose you find a rock and ch... A radioactive isotope has a half life of 25 years. There was 100 mg of the isotope in 2005. (a) Find... Two radioactive sources X and Y have half-lives of 3.0 hours and 2.0 hours, respectively. The produc... How much of a radioactive substance must be presented to decay to 60 grams in 11 years if the half-l... The percent P of a radioactive substance remaining after time t weeks is given by the formula p = 10... 1.Carbon-14 is a radioactive isotope. What is an isotope? What is the approximate half-life of ca... these two radioactive elements decay by electron capture (EC). Write the nuclear reactions for each... a certain radioactive element has a half life of 31.2 years. in how many years will contamination re... A radioactive substance is leaking from an underground storage tank. It spread 1000 meters from the... If 60​% of a radioactive element remains radioactive after 200 million​ years, then what percent rem... A radioactive substance has a half-life of 3 minutes. After 9 minutes, the count rate was observed t... If 25.0 g of a radioactive sample is left after 100.0 years and each half-life is 25 years, how much... a certain radioactive isotope has a half life or 850 years.how many years would it take for a given... How does a radioactive atom’s half-life influence its effect on its environment? Why is it important... Radioactive radium () has a half-life of 1599 years. What percent of a given amount will remain afte... Radioactive materials are often used in biological studies. A radiation biologist studies the rate o... Strontium-90 is a radioactive waste product from nuclear reactors. It has a half-life of 29 years. H... Tc-99 is a radioactive isotope that decays by beta emission and is used by radiologists in the diag... A particular radioactive substance has a half-life of 4 minutes. How long will it take for 250 g of... radioactive disintegration is 1st order reaction. calculate the age of ancient wood piece if it show... A radioactive sample contains 2.45g of an isotope wiht a half life of 3.8 days. How much of the isot... A certain radioactive substance has a half-life of 1 hour. If you start with 1 gram of the material... a certain radioactive isotope has a half life of approx 1,300 years . How many years to the neares... a radioactive material is undergoing nuclear decay. After 40 minutes, 25% of the sample remains. Wha... In the radioactive formula, 235 U → 235 Np = X, what does X represent 92 93 A. A... Two radioactive isotopes are extracted from spent nuclear fuel and placed in a metal container, whic... If a radioactive isotope has half life of 5 days,how long will it take for its radioactive strength... If a radioactive isotope has half life of 5 days,how long will it take for its radioactive strength... A radioactive element has a half-life of 6.41 days. What percent of the original sample will be left... A certain radioactive element has a half life of 1 h. If you start with a 1-g sample of the element... A 71 mg sample of a radioactive nuclide is administered to a patient to obtain an image of her thyro... A viral contains radioactive iodine -131 with an activity of 2.0 mCi per milliliter. If the thyroid... As a sample of the radioactive isotope 131 I decays, its half-life a)decreases b)increases c)re... If 250 mg of a radioactive element decays to 200 mg in 48 hours, find the half-life of the element A radioactive sample contains 3.25 1018 atoms of a nuclide that decays at a rate of 3.4 1013 disin...