AnswersFoothill-B Period-Chemistry-2627BHalf-LifeQuestion 1
1
AssignmentMultiple Select

Half-Life

Question 1 • Foothill-B Period-Chemistry-26/27B

Which statements are correct about Becquerel (Bq) and Gray (Gy) units? Check all that apply.

Answer
A
Gray units measure the number of disintegrations of radioactive atoms over a period of time.
B
Gray units measure the radiation dose absorbed by any material.
C
Becquerel units measure the radiation dose absorbed by biological tissue.
D
Becquerel units measure emitted radiation.
E
Gray units measure radiation dose.
F
Gray units measure biological risk.

Explanation

A becquerel measures radioactive activity: one Bq equals one nuclear disintegration per second, so it describes emitted radiation rather than absorbed dose. A gray measures absorbed dose, or energy deposited per kilogram of material, including biological tissue. Gray does not measure radioactive disintegrations or biological risk, so B, D, and E are correct.

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