Revision: Radioactivity Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. 21 Radioactivity - Revision Quiz Test your understanding of Radioactivity here: 1 / 5 1) Which statement is not a method used to minimise the risk caused by working with radioactive sources? Strore the sources in lead-lind boxes. Minimise the amount of time spent handling the sourses. Keep the sources as far away from your body as possible. Keep the sources cold. 2 / 5 2) What is the nature of an alpha particle? It is a fast moving helium atom. It is a fast moving helium nucleus. It is an electromagnetic wave. It is a fast moving electron. 3 / 5 3) A detector of ionising radiation gives a background rate of 18 counts per minute. A radioactive source is placed close to the detector and the reading is 158 counts per minute. What will be the reading after one half-life of the source? 88 61 140 70 4 / 5 4) In a fission reactor, which particle causes a Uranium-235 nucleus to split? alpha-particle neutron gamma ray proton 5 / 5 5) A nucleus consists of 90 protons and 144 neutrons. After emitting two beta particles and an alpha particle, this nucleus has 90 protons and 142 neutrons 90 protons and 140 neutrons 86 protons and 140 neutrons 86 protons and 142 neutrons Your score is Restart quiz
