according to the “geologically important radioactive elements,” which isotope is best used for dating rocks…

according to the “geologically important radioactive elements,” which isotope is best used for dating rocks that are over 1 billion years old and contain the mineral apatite? 1. carbon - 14 2. potassium - 40 3. uranium - 238 4. rubidium - 87 submit answer

according to the “geologically important radioactive elements,” which isotope is best used for dating rocks that are over 1 billion years old and contain the mineral apatite? 1. carbon - 14 2. potassium - 40 3. uranium - 238 4. rubidium - 87 submit answer

Answer

Brief Explanations:

Carbon - 14 has a short half - life and is used for dating relatively recent organic materials. Potassium - 40 has a half - life of 1.25 billion years and can be used for dating rocks of a wide age range including those over 1 billion years old. Uranium - 238 has a very long half - life but is not the most common for apatite - containing rocks in this context. Rubidium - 87 is also used for dating but potassium - 40 is more suitable for the given conditions.

Answer:

  1. Potassium-40