Domanda del libro di testo
The dosage of technetium-99m for a lung scan is 20. µCi/kg of body mass. How many millicuries of technetium-99m should be given to a 50.0-kg person (1 mCi = 1000 µCi)
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Ch.5 Nuclear Chemistry
Timberlake13th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9780134421353
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TOC.tableOfContents
- Ch.1 Chemistry in Our Lives11
- Ch.2 Chemistry and Measurements80
- Ch.3 Matter and Energy54
- Ch.4 Atoms and Elements51
- Ch.5 Nuclear Chemistry42
- Ch.6 Ionic and Molecular Compounds57
- Ch.7 Chemical Quantities and Reactions41
- Ch.8 Gases29
- Ch.9 Solutions51
- Ch.10 Acids and Bases and Equilibrium65
- Ch.11 Introduction to Organic Chemistry: Hydrocarbons78
- Ch.12 Alcohols, Thiols, Ethers, Aldehydes, and Ketones83
- Ch.13 Carbohydrates54
- Ch.14 Carboxylic Acids, Esters, Amines, and Amides90
- Ch.15 Lipids61
- Ch.16 Amino Acids, Proteins, and Enzymes84
- Ch.17 Nucleic Acids and Protein Synthesis83
- Ch.18 Metabolic Pathways and ATP Production67
Timberlake13th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9780134421353Non è quello che usi tu?Cambia libro di testo
Capitolo 5, Problema 28b
Suppose a person absorbed 50 mrad of alpha radiation. What would be the equivalent dose in millisieverts?
Guida verificata passo dopo passo1
Step 1: Understand the relationship between absorbed dose (in rad) and equivalent dose (in sieverts). The equivalent dose is calculated using the formula: , where is the equivalent dose in sieverts, is the absorbed dose in grays, and is the radiation weighting factor.
Step 2: Convert the absorbed dose from millirads (mrad) to grays (Gy). Recall that 1 rad = 0.01 Gy, and 1 mrad = 0.00001 Gy. Multiply the given absorbed dose (50 mrad) by 0.00001 to convert it to grays.
Step 3: Identify the radiation weighting factor () for alpha radiation. Alpha particles have a weighting factor of 20 because they are highly ionizing.
Step 4: Multiply the absorbed dose in grays by the radiation weighting factor to calculate the equivalent dose in sieverts. Use the formula: .
Step 5: Convert the equivalent dose from sieverts to millisieverts (mSv). Recall that 1 sievert = 1000 millisieverts. Multiply the result in sieverts by 1000 to express the equivalent dose in millisieverts.
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Radiation Dose
Radiation dose refers to the amount of energy deposited by ionizing radiation in a given mass of tissue. It is typically measured in grays (Gy) or rads, where 1 rad equals 0.01 Gy. Understanding radiation dose is crucial for assessing potential biological effects and risks associated with exposure.
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Percorso guidato
02:29
Intro to Radioactivity
Equivalent Dose
Equivalent dose is a measure that accounts for the biological effect of different types of radiation on human tissue. It is expressed in sieverts (Sv) or millisieverts (mSv) and is calculated by multiplying the absorbed dose by a radiation weighting factor, which varies depending on the type of radiation (e.g., alpha, beta, gamma).
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Percorso guidato
01:43Equivalents Concept 1
Radiation Weighting Factor
The radiation weighting factor is a numerical value that reflects the relative biological effectiveness of different types of radiation. For alpha particles, this factor is typically set at 20, meaning that alpha radiation is considered 20 times more effective at causing biological damage than gamma or beta radiation. This factor is essential for converting absorbed dose to equivalent dose.
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Percorso guidato
02:29Intro to Radioactivity
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Two technicians in a nuclear laboratory were accidentally exposed to radiation. If one was exposed to 8 mGy and the other to 5 rad, which technician received more radiation?
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