Rates of Radioactive Decay (Section)
Each statement that follows refers to a comparison between two radioisotopes, A and X. Indicate whether each of the following statements is true or false, and why. (a) If the half-life for A is shorter than the half-life for X, A has a larger decay rate constant., (b) If X is “not radioactive,” its half-life is essentially zero., (c) If A has a half-life of 10 yr, and X has a half-life of 10,000 yr, A would be a more suitable radioisotope to measure processes occurring on the 40-yr time scale.
Cayla Haupt Dr. Tong Ren Chem 115 Nuclear Chemistry Lecture August 25th, September 1st 2016 I. Nuclear Chemistry is All Around Us A. Americium is in smoke detectors. B. Fluorine is in our bodies. C. Thorium is in gas lamps. D. Plutonium in rocketships. E. Uranium glows in the dark. II. Structure of the Neutral Atom A. Mostly empty space. B. Nucleons: protons+neutrons. C. Nuclide: The specific composition of a nucleus. 1. Often designated by its mass number. D. Positive nucleus is approximately10 ❑−14❑ m.