List two radioactive isotopes of oxygen:

oxygen-13 oxygen-14

Explanation:

there are several radioactive

This question is asking about isotopes of oxygen that are radioactive, and two of these isotopes would be oxygen-13 and oxygen-14. Isotopes are atoms (of an element) with different numbers of neutrons. An atom such as carbon-12 contains 6 protons and 6 electrons; carbon-13 on the other hand contains 6 protons and 7 neutrons.

Explanation:

Atomic numbeor 16 oxygen can form two forms, depending on how it is created in the body.  

Standard hydrogen-1 (H) isotopes are formed when the element splits. Radioactive deuterium (D) isotopes are formed when atoms of standard hydrogen-1 combine with an atom of oxygen to form deuterium oxide molecules. A third radioactive form that occurs naturally is excited or energetic triplet oxygen (O3).

Triplet oxygen has a lower threshold for excitation than either normal molecular hydrogen or normal molecular oxygen because it contains both light and heavy particles in its nucleus. Triplet state O2 most often decays by emitting visible light, but some transformations may cause visible light to be emitted also

Radioactive isotopes are variants of the same element that have different atomic weights. They are called isotopes because they are all members of the same element, due to having different numbers of neutrons in their atomic nuclei. The three forms of oxygen have the similar chemical properties so it's tough to distinguish between them. That's why science students use radioactive isotopes for distinguishing between oxygen-12 and hydrogen-1. The primary differences between these isotopes are their mass numbers. When one or more protons are added to the nucleus, the atom becomes unstable. Because of this instability, it's likely that an electron will be emitted from one atom rather than an electron being added to it, according to NKScience .