(a)
Interpretation:
Decay reaction of potassium-40 to calcium-40 is alpha decay or beta decay has to be classified.
Concept Introduction:
If the reaction occurs in the nucleus of an atom then it is known as nuclear reaction. These reactions are not considered as ordinary
This nuclear reaction can be represented by
The radioactive decay can take place by emission of alpha particle, beta particle or gamma ray emission. Alpha particle decay is a process in which an alpha particle is emitted. This results in the formation of nuclide of different element that has atomic number that is 2 less and mass number that is 4 less than the original nucleus. Beta particle decay is a process in which a beta particle is emitted. This produces a nuclide of different element similar to that of alpha particle decay. The mass number is same as that of parent nuclide while the atomic number increases by 1 unit. Gamma ray emission is a process in which the unstable nucleus emits gamma ray. This occurs along with alpha or beta particle emission. The gamma rays are not shown in the nuclear equation because they do not affect balancing the nuclear equation.
(b)
Interpretation:
Decay reaction of lead-204 to mercury-200 is alpha decay or beta decay has to be classified.
Concept Introduction:
If the reaction occurs in the nucleus of an atom then it is known as nuclear reaction. These reactions are not considered as ordinary chemical reactions because the electrons do not take part in reaction while the particle inside the nucleus does. Isotope and nuclide are almost similar terms. Isotopes refer to the same element that has different mass number while nuclide refers to atoms of same or different elements with specific atomic number and mass number.
This nuclear reaction can be represented by nuclear equation. This is not a normal chemical equation. Nuclear equation considers the mass number and atomic number of the reactants and products. Unstable nucleus tends to emit radiation spontaneously. During this process the nuclide is transformed into nuclide of another element. Parent nuclide is the one which undergoes the radioactive decay. Daughter nuclide is the one that is formed from parent nuclide after radioactive decay.
The radioactive decay can take place by emission of alpha particle, beta particle or gamma ray emission. Alpha particle decay is a process in which an alpha particle is emitted. This results in the formation of nuclide of different element that has atomic number that is 2 less and mass number that is 4 less than the original nucleus. Beta particle decay is a process in which a beta particle is emitted. This produces a nuclide of different element similar to that of alpha particle decay. The mass number is same as that of parent nuclide while the atomic number increases by 1 unit. Gamma ray emission is a process in which the unstable nucleus emits gamma ray. This occurs along with alpha or beta particle emission. The gamma rays are not shown in the nuclear equation because they do not affect balancing the nuclear equation.
(c)
Interpretation:
Decay reaction of U-238 to Th-234 is alpha decay or beta decay has to be classified.
Concept Introduction:
If the reaction occurs in the nucleus of an atom then it is known as nuclear reaction. These reactions are not considered as ordinary chemical reactions because the electrons do not take part in reaction while the particle inside the nucleus does. Isotope and nuclide are almost similar terms. Isotopes refer to the same element that has different mass number while nuclide refers to atoms of same or different elements with specific atomic number and mass number.
This nuclear reaction can be represented by nuclear equation. This is not a normal chemical equation. Nuclear equation considers the mass number and atomic number of the reactants and products. Unstable nucleus tends to emit radiation spontaneously. During this process the nuclide is transformed into nuclide of another element. Parent nuclide is the one which undergoes the radioactive decay. Daughter nuclide is the one that is formed from parent nuclide after radioactive decay.
The radioactive decay can take place by emission of alpha particle, beta particle or gamma ray emission. Alpha particle decay is a process in which an alpha particle is emitted. This results in the formation of nuclide of different element that has atomic number that is 2 less and mass number that is 4 less than the original nucleus. Beta particle decay is a process in which a beta particle is emitted. This produces a nuclide of different element similar to that of alpha particle decay. The mass number is same as that of parent nuclide while the atomic number increases by 1 unit. Gamma ray emission is a process in which the unstable nucleus emits gamma ray. This occurs along with alpha or beta particle emission. The gamma rays are not shown in the nuclear equation because they do not affect balancing the nuclear equation.
(d)
Interpretation:
Decay reaction of Rh-104 to Pd-104 is alpha decay or beta decay has to be classified.
Concept Introduction:
If the reaction occurs in the nucleus of an atom then it is known as nuclear reaction. These reactions are not considered as ordinary chemical reactions because the electrons do not take part in reaction while the particle inside the nucleus does. Isotope and nuclide are almost similar terms. Isotopes refer to the same element that has different mass number while nuclide refers to atoms of same or different elements with specific atomic number and mass number.
This nuclear reaction can be represented by nuclear equation. This is not a normal chemical equation. Nuclear equation considers the mass number and atomic number of the reactants and products. Unstable nucleus tends to emit radiation spontaneously. During this process the nuclide is transformed into nuclide of another element. Parent nuclide is the one which undergoes the radioactive decay. Daughter nuclide is the one that is formed from parent nuclide after radioactive decay.
The radioactive decay can take place by emission of alpha particle, beta particle or gamma ray emission. Alpha particle decay is a process in which an alpha particle is emitted. This results in the formation of nuclide of different element that has atomic number that is 2 less and mass number that is 4 less than the original nucleus. Beta particle decay is a process in which a beta particle is emitted. This produces a nuclide of different element similar to that of alpha particle decay. The mass number is same as that of parent nuclide while the atomic number increases by 1 unit. Gamma ray emission is a process in which the unstable nucleus emits gamma ray. This occurs along with alpha or beta particle emission. The gamma rays are not shown in the nuclear equation because they do not affect balancing the nuclear equation.
Want to see the full answer?
Check out a sample textbook solutionChapter 11 Solutions
EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- Many radioactive isotopes are used in medicine for imaging and treatment purposes. The specific isotopes used depends on the particular organ or body system being studied (for example, Xe-133 is used to image lung function and blood flow.) Technetium-99m is a common radioactive isotope using for a variety of medical applications. It is produced from the decay of Molybdenum-99 and has a half-life of 6.01 hours. What are some of the applications of Tc-99m? While harder to access, another radioactive isotope of technetium, Tc-93, has a half-life of 2.73 hours. If it were easier to harvest, would this be a good substitute for Tc-99m? (remember to explain why for full credit) While Tc-99m has a half-life of 6.01 hours, its decay product has a half-life of 213,000 years. While the medical community considers it to be reasonably safe, within the limits of testing, does this make sense considering both chemical and biological principles? What are possible ways that you might deal with or…arrow_forwardWhat is the unknown isotope in the following fission reaction: n + 235U → 131I + ? + 3nA. 86Rb B. 102Rb C. 89Y D. 102Yarrow_forwardRadioactivity is a phenomenon of the spontaneous emission of: A. protons (alpha particles) B. electrons (beta particles) C. gamma rays (short wave electromagnetic waves) D. All of the abovearrow_forward
- The decay of an isotope element follows a first-order reaction. Assuming that you start with 964 mg of the isotope element sample, after 39.4 hours of decay, you find that there is 275 mg of the sample remaining. What is the half-life time of this reaction?arrow_forward238. 234. 14) Uranium-238 ( 92") decays to form thorium-234 ( 90 h) with a half-life of 4.5 x 10° years. How many years will it take for 75% of the uranium-238 to decay? а) 9.0х 10 years с) 9.0х10° years b) 4.5 x 10° years d). 3.8 х 10° усаrsarrow_forwardExplain how the type of decay, the half life and the chemical properties make the following radionuclides suitable for the given applications: A single gram of polonium will reach a temperature of 500°C making it useful as a source of heat for space equipment (α emitter, half lives of polonium isotopes range from less than a second to 200 years).arrow_forward
- Technetium-99m (99m Tc) is a radioactive isotope commonly used in medical diagnosis. It emits gamma rays with a half-life of 6.0058 hours. A sample with activity 8.5 × 108 Bq is injected into a patient What percentage of this activity will remain after 28 hours? Give your answer as a percentage to 1 decimal place. Percentage of activity remaining: %arrow_forwardPolonium is a rare element with 33 radioisotopes. The most common one, 210Po, has 82 protons and 128 neutrons. When 210Po decays, it emits an alpha particle, which is a helium nucleus (2 protons and 2 neutrons). 210Po decay is tricky to detect because alpha particles do not carry very much energy compared to other forms of radiation. For example, they can be stopped by a single sheet of paper or a few inches of air. That is one reason that authorities failed to discover toxic amounts of 210Po in the body of former KGB agent Alexander Litvinenko until after he died suddenly and mysteriously in 2006. What element does an atom of 210Po become after it emits an alpha particle?arrow_forwardCarbon-14 is a radioactive material. It contains 6 protons and 8 neutrons. During the process of Carbon-14 decay, one of its 8 neutrons becomes a proton and an electron is formed in the process. Based on this information, select all that apply. The mass number is unchanged by the decay of Carbon-14. The mass number is changed by the decay of Carbon-14. After decay the atom is still Carbon. After decay the atom is not Carbon.arrow_forward
- A 10.00 mg sample of technetium-93 (92.91024898 u) is used to heat 125.4 g of water from 23.4 degree C to 87.4 degree C. How many minutes will be required to heat the water if all of the energy generated from the decay is used to heat the water?arrow_forwardIsotopes differ from each other only in the number of electrons they contain. Select one: a. True b. Falsearrow_forwardThe half-life of 1311 is 8.04 days. (a) Convert the half-life to seconds. (b) Calculate the decay constant for this isotope. s-1 (c) Convert 0.550 µCi to the SI unit the becquerel. |Bq (d) Find the number of 1311 nuclei necessary to produce a sample with an activity of 0.550 μCi. | 1311 nuclei (e) Suppose the activity of a certain 131I sample is 7.10 mCi at a given time. Find the number of half-lives the sample goes through in 40.2 d and the activity at the end of that period. (Enter your answer for the number of half-lives to at least one decimal place.) half-lives mCiarrow_forward
- Biology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage Learning