What have you learned about radioactive dating? Check all that apply. Unstable atoms release particles. The radioactive decay of an element occurs at a constant rate. A half-life is half of the lifetime of a radioactive element. At one half-life, half of the original unstable element has decayed. All elements are radioactive.

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What can be learned from radioactive dating? Radioactive dating is used to determine the absolute ages of rocks. ... Radioactive dating shows that the oldest moon rocks are about 4.6 billion years old. Scientists infer that Earth is only a little older than those moon rocks-roughly 4.6 billion years old.