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10 Nov 2019
An important application of nuclear chemistry is in the treatment of cancer. One method of treating brain tumors is brachytherapy using iodine -125. "Seeds" containing ^125 I are implanted directly into tumors. As ^125 I decays, gamma rays (gamma) are emitted destroying the tumor cells. a) The mass of an ^125 I nucleus is 124.904624 amu. What is the atomic number of ^25 I? What is the mass number of ^125 I? How many protons, neutrons, and electrons are in ^125 I? atomic # ____ mass # ____ # protons in ^125 I ____ # neutrons in ^125 I ____ #electrons in ^125 I ____ b) ^125 I is produced by a two-step process. In step 1) ^124Xe nuclei arc bombarded with neutrons to produce 125Xe. In step 2) ^125Xe decays by electron capture to produce ^125 I. Complete the nuclear equations for the above two steps by filling in the '____' below. c) The initial dose of gamma rays from the freshly implanted ^125 I seeds is 100 rem/day. Given a half-life of ^125 I of 59.4 days, what is the daily dose of gamma rays after 6 months?
An important application of nuclear chemistry is in the treatment of cancer. One method of treating brain tumors is brachytherapy using iodine -125. "Seeds" containing ^125 I are implanted directly into tumors. As ^125 I decays, gamma rays (gamma) are emitted destroying the tumor cells. a) The mass of an ^125 I nucleus is 124.904624 amu. What is the atomic number of ^25 I? What is the mass number of ^125 I? How many protons, neutrons, and electrons are in ^125 I? atomic # ____ mass # ____ # protons in ^125 I ____ # neutrons in ^125 I ____ #electrons in ^125 I ____ b) ^125 I is produced by a two-step process. In step 1) ^124Xe nuclei arc bombarded with neutrons to produce 125Xe. In step 2) ^125Xe decays by electron capture to produce ^125 I. Complete the nuclear equations for the above two steps by filling in the '____' below. c) The initial dose of gamma rays from the freshly implanted ^125 I seeds is 100 rem/day. Given a half-life of ^125 I of 59.4 days, what is the daily dose of gamma rays after 6 months?
Patrina SchowalterLv2
25 Jul 2019