3.57: Radioisotopes Difficulty Level: At Grade Created by: CK-12 % Progress Practice Progress % Practice Now Share Add to Library Turn In Read Practice Resources Details Loading... Notes/Highlights Having trouble? Report an issue. Color Highlighted Text Notes Show More Vocabulary Language: English ▼ English radioisotope Radioactive isotope, or isotope that emits radiation from its nucleus. Image Attributions Show Hide Details Description What a radioisotope is and why they have unstable nuclei. Elements in which all of the isotopes are radioactive. Learning Objectives None Difficulty Level: At Grade Authors: Jean Brainard, Ph.D. Tags: carbon-14 radioactive element radioisotope (4 more) SCI.CHE.614.L.1 SCI.PSC.161.4.L.1 unstable nuclei unstable nucleus Subjects: science Physical Science Concept Nodes: SCI.PSC.161.4 (Radioisotopes) Grades: 7 , 8 Date Created: Nov 14, 2012 Last Modified: Sep 13, 2016 Vocabulary None Save or share your relevant files like activites, homework and worksheet.To add resources, you must be the owner of the Modality. Click Customize to make your own copy.