Iodine-131, which is used in the radiation treatment of thyroid gland disorders,

Question

Iodine-131, which is used in the radiation treatment of thyroid gland disorders, decays to Xenon-131 by emitting X. What is X?^131 I rightarrow^131Xe + X A. An alpha particle, ^4_2He B. A beta particle, _1^0 0 C. a neutron, n D. a positron, _+1^0 0 True or False for an endothermic reaction that is spontaneous at 25 degree C? More than one choice may be correct. A. ___The reaction will become non-spontaneous at some temperature above 25 degree C. B.___the reaction absorbs heat from the surroundings as it proceeds. C .____Delta G for the reaction is negative D.___Delta S_universe > 0. E _Delta S > 0 True or False for a battery that has reached equilibrium a) ____the battery is dead b) ____The standard state cell potential (epsilon_cell^0) must equal zero. c) ___The cell potential (epsilon_cell) must equal zero. d) ____The entropy of the universe is maximized with respect to the reaction. e) ____The Gibbs free energy of the reaction is maximized.

Explanation / Answer

Ans 8. B . a beta particle

Iodine -131 decays into Xenon -131 giving a beta particle and has half life period of 8.02 days .

This is used to treat hyperthyroidism caused by Grave's disease.

It undergoes 2 step radioactive decay giving high energy electrons and electromagnetic radiation in the form of gamma rays .

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