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CHEMISTRY Y12 Production of Materials CLOZE PASSAGE No 5 Nuclear Chemistry Complete the following sentences using appropriate words or short phrases a) The charge on the nucleus of any atom Positive b) Atoms of the same element that contains different numbers of neutrons Isotope c) An alpha particle is a ………………………… nucleus and has a charge ………… Helium, 2+ d) Complete the sequence alpha, beta and …………………..rays Gamma f) French chemist who discovered accidentally discovered radioactivity Becquerel g) The nuclear radiation that is least penetrating Alpha h) An ionisation counter used to detect radiation Geiger counter i) An atom of Uranium 238 contains how many neutrons 146 j) The type of emission when Carbon-14 forms Nitrogen-14 Beta emission k) A method of measuring the rate of radioactive decay Half - life l) Transmutation The change of 1 element into another involving a change in nuclear composition m) The first actinide element that is not naturally occurring Neptunium n) The location of Australia’s nuclear reactor Lucas Heights o) General name of all the elements from number 93 onwards Transuranic p) A radioisotope used in medicine with an atomic number 43 Technetium-99 q) Found at Royal Prince Alfred Hospital and accelerates charged particles in a circular motion Cyclotron r) Atomic number of the most recently discovered element 118 s) Technitium-99 has a half life of ……………. 6 hours t) Radioactive Strontium-90 is very similar to ……………………… found in bones Calcium u) The radiation that everyone is continually exposed to is called …………………radiation Background v) Radiation can be used to ……………………medical instruments Sterilise w) Used to produce neutron rich radioisotopes Nuclear reactor x) The charge on a Beta particle -1 y) Iodine 131 is used to treat and diagnose diseases of the …………………..gland Thyroid z) Radioisotopes can be used in medicine and in …………………….. Industry