What are two radioactive isotopes of oxygen? Biology Origin of Life on Earth Radioactive Carbon Dating 1 Answer Abdul Sammad Feb 11, 2016 Oxygen-15 and oxygen-13. Answer link Related questions Why does carbon 14 undergo radioactive decay? How can half-life be described in terms of radioactive decay? What are some examples of radioisotopes? What are radioisotopes? What is half-life? What is radioactive carbon dating? How can carbon 14 be used in biology? How can carbon 14 be used to date organic material? How carbon 14 dating is done? How does carbon 14 decay? See all questions in Radioactive Carbon Dating Impact of this question 21600 views around the world You can reuse this answer Creative Commons License