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

Q: Who discovered Radioactivity? How?

A: Radioactivity is the spontaneous emission of radiation in the form of particles or high energy…

Q: Manganese-49 (Mn-49, Z=25) decays by emitting a positron. What is the formula of the "daughter…

A: Mn-49 undergoes posisrron emission.

Q: What units are used to measure radioactivity?

A: Radioactive decay or radioactivity refers to the breakdown of an unstable nucleus to a stable…

Q: Three nuclear techniques and explain

A: Name of nuclear technique and explanation is given below.

Q: Describe some of the medical uses, both in diagnosis and in treatment of disease, of radioactivity?

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Q: What is the meanings of radioactivity, nucleon, nuclide, and isotope

A: What are the meanings of radioactivity, nucleon, nuclide, and isotope?

Q: 127 Cs -> "He + ? 55

A: The completed nuclear reaction is given below

Q: Write balanced equations for the decays of 13N and 18F, two other radioisotopes that are used in…

A: Positron collision with an electron causes annihilation.In annihilation process any subatomic…

Q: Explain what is meant by (a.) radioactivity (b.) half-Ilfe Why is it necessary to specify the…

A: a) Radioactivity is a process or phenomenon of disintegration of unstable nucleus into stable…

Q: Predict a likely mode of decay for unstable nuclide. P-27

A: The decomposition of parent nucleus to the stable daughter nucleus takes place by nuclear decay…

Q: 2. What is the difference between radioactive decay and nuclear transmutation?

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Q: If Iodine-131 undergoes alpha decay, what is the product nuclide?

A: The property of a nucleus emitting α, β and γ rays is known as radioactivity and the substance…

Q: Which of the following nuclides is produced when the nucleus of indium-89 captures one of its inner…

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Q: What are magic numbers? How are they important in determining the stability of a nuclide?

A: The magic numbers are defined as the number of nucleons required for completion of the energy levels…

Q: what type of radioactivity occurs on the decay of polonium-216 to bismuth-216?

A: There are different type of dicays like alpha decay , beta decay , Gamma decay, positron emission…

Q: Based on nuclear stability, what is the symbol for the most likely product nuclide when gallium-67…

A: Based on nuclear stability ,the symbol for the most likely product nuclide when gallium 67 undergoes…

Q: What nuclide will produce 233Pa upon undergoing alpha decay?

A: Alpha decay is a type of radioactive decay in an atomic nucleus emits Alpha particle and thereby…

Q: What is the type of decay that converts Kr-84 to Rb-84?

A: The different types of decay are : Alpha decay is one process that unstable atoms can use to become…

Q: (237)Np is the parent of an extinct natural decay chain that ended in (209)Bi. What is the longest…

A: The nuclear reactions are a type of chemical processes which lead to the formation of some new…

Q: Many nuclides with atomic numbers greater than 83 decay by processes such as electron emission.…

A: Alpha particles are the divalent cation of helium or nucleus of helium with two protons and two…

Q: )Explain each statement. Gamma decay does not change the atomic number or mass number of the…

A: answer- a.  Yes, gamma decay does not change the atomic number or mass number of decaying nuclide.…

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

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Q: What is the daughter nuclide when Co-55 experiences positron emission? (Write your answer as a…

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Q: Iodine-131 undergoes beta emission with a decay constant of 0.0864 1/days. If you start with 35.0 mg…

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Q: If 16.0 g of a nuclide with a half-life of 2.0 hr is allowed to decay for 10 hours, how much of the…

A: Chemical kinetics is the branch of chemistry that mainly deals with the rate of reaction and change…

Q: Explain the differences between the chemical reactions and the nuclear reactions

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Q: How is the nuclide 23892U altered by (i.) the emission of one α particle, (ii.) the emission of one…

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Q: The table to the right gives the number of protons (p) and neutrons (n) for four isotopes. Which…

A: The potassium-39 has mass number 39. The isotope which on positron emission gives potassium-39 must…

Q: What isotope results from a decay of the americium-241 in smoke detectors?

A: Isotope  They are the different forms of any chemical element in which the number of protons are…

Q: 5. Complete the following nuclear equations. 235 1 134. U 92 -> 54 Xe

A: If Z is atomic number and A is mass number of an element with symbol X , then  it is represented as…

Q: Rb ? + 37

A: A question based on nuclear chemistry, which is to be accomplished.

Q: How was radioactivity discovered?

A: Radioactivity was discovered accidentally in 1896 by French physicist Antoine Henri Becquerel.…

Q: True or false? During one half-life, the mass of a radioisotope is reduced by half. Explain.

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Q: B,B, a a emissions to produce uranium-236? What nucleus decays by successive

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Q: 254. Select the nuclide that completes the following nuclear reaction. 40 K 19 41 Ca 39 Ca 20 40 D)…

A: Beta emission means a radioactive species lose an electron and then the atomic number of that…

Q: Polonium-218 is an alpha emitter with a half-life of 3.0 minutes.If a sample contains 55 mg of…

A: To find alpha emissions:

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 6.6 g remain. What is the original…

A: Radio active decay obeys first order kinetics. The expression for rate constant:   Half life of…

Q: what is the connection between radioactivity and chart of nuclide?

A: Radioactivity is the act of emitting radiation spontaneously. This is done by an atomic nucleus…

Q: If the nuclide has a half-life of 12 hours, how much of the nuclide remains in the patient after 6.0…

A: Given :  Half life of nuclide  = 12 hours  Total time = 6 days   Or total time = 6 × 24 hours = 144…

Q: Explain Marie Curie’s role in the discovery of radioactivity?

A: Marie Curie has a major role in radioactivity. Radioactivity is the phenomenon by which the…

Q: Bi−210 is a beta emitter with a half-life of 5.0 days If a sample contains 1.0 g of Bi−210, how many…

A: Half life of a reaction is the time required for a reacton to complete it's half. That is, in half…

Q: A 58 mg sample of a radioactive nuclide is administered to a patient to obtain an image of her…

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Q: If a Xe-134 releases an alpha particle, what is the isotope that is produced?

A: If a Xe-134 releases an alpha particle, what is the isotope that is produced?