Co-60 is used extensively in radiotherapy. Its half-life is 5.27 years. How many years will it take to decrease to 30.0% if its original activity?

Q: Gadolium-153, which is used to detect osteoporosis, has a half life of 242 days. What percentage of…

A: Radioactive decay follows first order kinetics.Equation for half life, t½ = ln2 / kTherefore k = ln2…

Q: If a tree dies and the trunk remains undisturbed for 1.435 × 104 years, what percentage of the…

A: Cfinal / Cinitial = 0.5(time/half life ) where Cfinal = carbon content after time Cinitial = initial…

Q: The half-life of element X is 500 years. If there are initially 8 g of X, how much will remain after…

A:

Q: o-60 is used extensively in radiotherapy as a source of y-rays. Its half-life is 5.27 years. a) How…

A: Elements which are not stable gain stability by emitting rays, this type of elements are called…

Q: Americium-241 is widely used in smoke detectors. Calculate the amount of americium-241 consumed in a…

A: The radioactive substances mainly possess decay process through first-order kinetics and half-life…

Q: Cesium – 137 has a half life of 30 years. How much of a 100 mg sample is left after 120 years?

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

Q: 4. Iron-59, which is used to diagnose anemia, has a half-life of 45 days. What fraction of it is…

A: we know that,→ Radioactivity phenomena follow first owen                            knnetics.so,…

Q: Sodium-24, which is used to locate blood clots in the human circulatory system, has a half-life of…

A: Half life period: The time required to decay half of the initial amount is known as half life…

Q: Cobalt-60 has a half-life of 5.27 years and is used in cancer treatment. If a patient ingests 20.0 g…

A: Since the decay reactions are first order reactions hence the relationship between the time and mass…

Q: The half-life of selenium-83 is 22.3 min. If a sample contains 24.0g of selenium-83, how long will…

A:

Q: The half-life of radioactive radium (226Ra) is 1599 years. What percent of a present amount of…

A: Chemical changes in which species amount varies linearly along with time basically obey"first-order…

Q: Iodine-131 is administered orally in the form of Nal(aq) as a treatment for thyroid cancer. The…

A:

Q: Radioactive calcium-47 decays with a half-life of 4.5 days. A chemist obtains a fresh sample of…

A: Half life of sample T = 4.5 days Final radioactivity A' = (100-25) % of A = 75 % of A.  A is initial…

Q: gold -198 is used in the diagnosis of liver problems. the half-life of 198au is 2.69 days. if you…

A: Calculating the rate constant for first order reaction using half-life: t1/2=0.693k     .....(1)…

Q: The answer should be 26.7 days

A: Half-life:The time taken for half disintegration of radioactive element from its original amount is…

Q: A radioactive element has a half-life of 1.1 hours. How many hours will it take for the number of…

A:

Q: The half-life of mercury-203 is 46.6 days. What percentage of mercury-203 remains in a sample after…

A:

Q: Radioactive iodine (Iodine-131) has a half-life of 8.04 days. How long will it take for 150g of…

A: Given: The half-life of Iodine-131, t12 = 8.04 days. The initial amount of Iodine-131, (N0) = 150 g.…

Q: Iodine-131 is used in the diagnosis and treatment of thyroid disease and has a half-life of 8.0…

A: The half-life of any radioactive element is the time in which it has been consumed half of its…

Q: PET scans require fluorine-18, which is produced in a cyclotron and decays with a half-life of 1.83…

A: Given: Half life, T1/2 = 1.83 hrVelocity of transport, v= 60.0 miles/hrfinal Concentration of F-18 =…

Q: Iodine-131 has a half-life of 8.0 days. How long will it take 10 μg of 131I to decrease to 1/100 of…

A: We have given the half life of 131I that is t1/2 = 8 days from this we can find the out the decay…

Q: Cesium-134 is a β emitter with a half-life of 2.0 years. How much of a 2.50-g sample of cesium-134…

A: The radioactivity decay follows the first order kinetics. The formula for the first order kinetics…

Q: What is the half-life of polonium-210 if it takes 828 days for a 100.0 g sample to be reduced to 1.6…

A: Polonium-210 is a radioactive element so it's decay is followed first order kinetics.

Q: Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The…

A:

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium- 67 is 78.2 hours.…

A: Given   The half-life is 78.2 hours. The fall in activity of gallium-67 is 29.1 percent of its…

Q: The half-life of Radium-226 is 8 years. How much of an initial 171 g sample will remain after 43…

A:

Q: Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The…

A: Since the decay reactions are first order reactions always hence for the first order reaction we can…

Q: Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The…

A:

Q: One of the radioactive isotopes used in medical treatment or analysis is iodine-131. The half-life…

A: The relationship between the decay constant and the half-life period is given below.

Q: Cobalt-60 is used extensively in medicine as a source of g-rays. Its half-life is 5.27 years. How…

A:

Q: The half-life of plutonium-239 is 24,100 years. How long will it take for a 100 g sample of…

A: Given,  Half life, t1/2 = 24100 years Initial amount = 100 g Reduced amount = 25 g Formula Used…

Q: Americium-241 is widely used in smoke detectors. Calculate the amount of americium-241 consumed in a…

A:

Q: Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The…

A: Given half life = 8.04 days time = 12.7 days initial mass = 31.1 mg

Q: Thallium-201 is used medically to diagnose heart problems. The half-life of thallium-201 is 72.9…

A:

Q: What is the half-life of iron-55 if 5.93 years are required for the activity of a sample of iron-55…

A:

Q: The half-life of Ga-67 is 77.9 hours. How long will it take Ga-67 to decay and lose 95% of its…

A:

Q: original

A: t1/2 =  8.02 days t = ? for 99% decay

Q: The isotope cesium-137 has a half-life of 29.75 years. How long will it take a 100 gram sample of…

A: Radioactive decay reactions are first order reactions. The calculation can be done using first order…

Q: Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The…

A: Radioactive decay is always a first order reaction. According to the first order radioactive decay…

Q: What is the half-life of Californium- 252 based on the graph below?

A:

Q: What is the half-life of chromium-56 if 12.8 minutes are required for the activity of a sample of…

A: Radioactive decay follow first order kinectics . Half life for first order reaction  = 0.693/k  k is…

Q: If a tree dies and the trunk remains undisturbed for 1.620 x 104 what percentage of the original 1*C…

A:

Q: One of the radioactive isotopes used in medical treatment or analysis is iodine-125. The half-life…

A: radio active decay are first order                       Rate constant =0.693/half life…

Q: Americium-241 is widely used in smoke detectors. Calculate the amount of americium-241 consumed in a…

A:

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. How…

A: The decay reactions are first order reactions. Since we know that the relationship between the…

Q: What is the half-life of magnesium-20 if 1.24 seconds are required for the activity of a sample of…

A:

Q: The half-life of cesium-137 is 30.2 y. How long will it take for a sample of cesium-137 to decay to…

A: Half life of caesium- 137=30.2 years a0=x a1/2=x/8

Q: Thallium-201 is used medically to diagnose heart problems. The half-life of thallium- 201 is 72.9…

A:

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.