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anaisleblanc
anaisleblanc
Student
High School - 10th Grade

What are radioactive isotopes instead of C14?

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Posted by anaisleblanc on Sunday February 8, 2009 at 6:59 AM and tagged with c14, isotope, radioactive, science.

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  1. giorgiana1976
    giorgiana1976 Teacher
    Doctorate

    eNotes Editor

    Due to C14 half-life, we can date objects that are not older than 60,000 years. The dating method using radioactive isotopes could be extended, however, to other instable chemical elements that have longer half-lifes: potassium-40 (half life of 1.3 billion years), uranium-235 (half life of 704 billion years), thorium (half life of 14 billion years).

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    Posted by giorgiana1976 on Sunday February 8, 2009 at 7:09 AM