2)The isotope gold-198 is a β emitter and is used for the treatment of leukemia. The Half-life for its radioactive decay is 2.70 days. If the initial dose emits 60.0 mCi (mili Curies) of radiation, how many days will it take for the radiation level to drop to 7.50 mCi ?
Given:
Half life = 2.7 days
use relation between rate constant and half life of 1st order
reaction
k = (ln 2) / k
= 0.693/(half life)
= 0.693/(2.7)
= 0.2567 days-1
we have:
[A]o = 60 mCi
[A] = 7.5 mCi
k = 0.2567 days-1
use integrated rate law for 1st order reaction
ln[A] = ln[A]o - k*t
ln(7.5) = ln(60) - 0.2567*t
2.015 = 4.094 - 0.2567*t
0.2567*t = 2.079
t = 8.102 days
Answer: 8.10 days
2)The isotope gold-198 is a β emitter and is used for the treatment of leukemia. The...
Radioactive gold-198 is used in the diagnosis of liver problems. The half-life of this isotope is 2.7 days. If you begin with a sample of 9.4 mg of the isotope, how much of this sample remains after 2.4 days?
Radioactive gold-198 is used in the diagnosis of liver problems. The half-life of this isotope is 2.7 days. If you begin with a sample of 6.7 mg of the isotope, how much of this sample remains after 1.4 days?
Radioactive gold-198 is used in the diagnosis of liver problems. The half-life of this isotope is 2.7 days. If you begin with a sample of 9.6 mg of the isotope, how much of this sample remains after 1.9 days? mg
11.) Radioactive gold-198 is used in the diagnosis of liver problems. The half-life of this isotope is 2.7 days. If you begin with a sample of 9.0 mg of the isotope, how much of this sample remains after 1.8 days?
A radioactive isotope of phosphorus, 32P, is used in internal radiotherapy to treat patients with cancers and other diseases of the bone marrow. 32P has a half-life of 14.28 days and a atomic mass of 32P is 31.973 u. Via β decay, it emits an electron with an energy of 705 KeV and a RBE of 15.5 . As part of a treatment program, a patient ingests a radioactive pharmaceutical containing 32P which has an initial activity of 1.33 MBq....
A radioactive isotope of phosphorus, 32P, is used in internal radiotherapy to treat patients with cancers and other diseases of the bone marrow. 32P has a half-life of 14.28 days and a atomic mass of 32P is 31.973 u. Via β decay, it emits an electron with an energy of 705 KeV and a RBE of 15.5 . As part of a treatment program, a patient ingests a radioactive pharmaceutical containing 32P which has an initial activity of 1.47 MBq....
1. Iodine-131 is an isotope in the treatment of hyperthyrodisim and has an effective half- life of 7.6 days. If a patjent is given a dose of 10.0 mCi, how much radiation remains after 38 days? 2. Phosphorus-32 is a radisotope used to detect certain types of tumors. P-32 has an effective half-life of 14.1 days. If a patient recieves 6.0 mCi, how much radiatjon remains after 169.2 hours?
Ruthenium-106 (Ru106) is used to treat melanoma in the eye. This isotope decays by β−emission with a half-life of 373.59 days. One source of the isotope is reprocessed nuclear reactor fuel. How many protons and how many neutrons does the Ru106 nucleus contain? protons: neutrons: Identify the missing daughter nucleus in the β− emission decay of Ru106. Ru106⟶ ???? + e−+ν¯e+ e−+ν¯e How many years after Ru106 is implanted in the eye does it take for its decay rate (or...
Ruthenium-106 (106Ru) is used to treat melanoma in the eye. This isotope decays by β− emission with a half-life of 373.59 days. One source of the isotope is reprocessed nuclear reactor fuel. How many protons and how many neutrons does theRu106 nucleus contain? protons: neutrons: Identify the missing daughter nucleus in the β− emission decay of Ru106 Ru106⟶ + e−+ν¯e+ e−+ν¯e How many years after Ru106 is implanted in the eye does it take for its decay rate (or activity)...
Gold-198 has a half-life of 2.32*10^5 s. Initial activity = 10^9 Bq, which is used on a mold and worn by a patient for 5 days. What's the emitted radiation in terms of the # particles? FORMULAS A = λN λ = ln2/halflife A(t) = A0 e-λt ...