What is the SI unit of activity?

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Prepare for the Bioenvironmental Engineering Apprentice Block 7 - Ionizing Radiation Test. Utilize flashcards and multiple-choice questions, each complete with hints and explanations. Excel in your exam!

Multiple Choice

What is the SI unit of activity?

Explanation:
Activity is the rate at which a radioactive source undergoes decays. The SI unit for this rate is the becquerel, defined as one decay per second. This is a measure of how active the source is, not how much energy it deposits or its biological effect. For comparison, gray is the unit of absorbed dose (energy deposited per kilogram), and sievert accounts for biological impact. The curie is an older non-SI unit equal to 3.7 × 10^10 decays per second (about 37 gigabecquerels). So the SI unit of activity is the becquerel.

Activity is the rate at which a radioactive source undergoes decays. The SI unit for this rate is the becquerel, defined as one decay per second. This is a measure of how active the source is, not how much energy it deposits or its biological effect. For comparison, gray is the unit of absorbed dose (energy deposited per kilogram), and sievert accounts for biological impact. The curie is an older non-SI unit equal to 3.7 × 10^10 decays per second (about 37 gigabecquerels). So the SI unit of activity is the becquerel.

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