Final answer:
The highest Bq/g LSA class is LSA-III, and the lowest Bq/g LSA class is LSA-I. These classifications, determined by the IAEA, dictate safety measures for the handling and transport of radioactive materials.
Step-by-step explanation:
The highest Bq/g LSA (Becquerel per gram Low Specific Activity) class refers to the category of radioactive materials that have the greatest activity per unit mass. The International Atomic Energy Agency (IAEA) categorizes radioactive materials into LSA-I, LSA-II, and LSA-III, these classes are part of the regulations for the safe transport of radioactive material. The highest Bq/g LSA class is LSA-III, which contains materials that have a high specific activity and therefore a greater potential to emit radiation. Conversely, the lowest Bq/g LSA class is LSA-I, which includes materials with low levels of radioactivity. These classifications help determine how the materials should be handled, stored, and transported to ensure safety.