Carbon-14 is the typical radioisotope used to date materials; however, it has a limitation to 40,000 years. A

Question

Carbon-14 is the typical radioisotope used to date materials; however, it has a limitation to 40,000 years. A scientist who wants to date materials older than 40,000 years would most likely use which radioisotope?

uranium-238
rubidium-91
iodine-131
cobalt-60

GPT-5 mini · Answer

uranium-238

Reason: U-238 has a very long half-life (~4.5 billion years) and is used in uranium–lead dating for rocks and materials far older than the ~40,000-year limit of carbon-14 (C-14 has a half-life ~5,730 years).

Carbon-14 is the typical radioisotope used to date materials; however, it has a limitation to 40,000 years. A scientist who wants to date materials older than 40,000 years would most likely use which radioisotope?

uranium-238
rubidium-91
iodine-131
cobalt-60

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Carbon-14 is the typical radioisotope used to date materials; however, it has a limitation to 40,000 years. A scientist who wants to date materials older than 40,000 years would most likely use which radioisotope? uranium-238 rubidium-91 iodine-131 cobalt-60

All Answers 1

Submit Your Answer

Carbon-14 is the typical radioisotope used to date materials; however, it has a limitation to 40,000 years. A scientist who wants to date materials older than 40,000 years would most likely use which radioisotope?

uranium-238
rubidium-91
iodine-131
cobalt-60