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01:15:00 chem103-070-20191203-153000.mp4 chem103-070-20191203-153000.mp4	chem103-070-20191203-153000.mp4 Video Created by UD Capture Classroom Recording in Smith 120 on 2019-12-03 15:30:00. 19f chem103 070 nucleus mass energy radiation neutrons carbon nuclei point half power problem protons things thing electrons slide radioactivity times equation kilograms From Dana Chatellier 0 likes 40 plays 0