Becquerel
Gray
Rutherford
Curie
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Answer is Wrong!
The correct answer is: A. Becquerel
A becquerel (Bq) is the SI unit of radioactivity. It is defined as the activity of a quantity of radioactive material in which one nucleus decays per second.
A gray (Gy) is the SI unit of absorbed dose of ionizing radiation. It is defined as the energy absorbed per unit mass of matter.
A curie (Ci) is a non-SI unit of radioactivity. It is defined as the activity of 1 gram of radium-226, which is equal to 3.7 Ã 1010 decays per second.
A rutherford (rd) is a non-SI unit of radioactivity. It is defined as the activity of 106 decays per second.
The becquerel is the most commonly used unit of radiation because it is the SI unit and it is more precise than the other units.