which property of argon makes it useful for potassium - argon dating?\nit decays into potassium.\nit is an…

which property of argon makes it useful for potassium - argon dating?\nit decays into potassium.\nit is an unstable element.\nit remains trapped in rock.
Answer
Brief Explanations:
In potassium - argon dating, argon remains trapped in rock. Potassium decays into argon over time and the trapped argon helps determine age.
Answer:
It remains trapped in rock.