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General Questions Inventions and Discoveries Sound Wave Metals and Non-metals Plants Food and Nutrition Heat and Temperature Soil Science Motion and Time Light Microorganisms Reproduction Force and Pressure Friction … Radioactivity Regular Alpha and Beta rays are bent in opposite directions in a magnetic field, thus have opposite charge; while gamma rays are not bent at all. 9. Based on the figure below, radioactive activity after decay for 13.86 hours is …, A = radioactive activity, λ = the decay constant, Nt = The number of radioactive atoms after decaying during a certain time interval, T1/2 = half-life. Advertisement doc, 653 KB. radioactivity answers. … ATOMS: TYPES OF RADIOACTIVITY QUESTIONS . 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