From analysis of decay products they concluded that

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From analysis of decay products, they concluded that four atoms of element 115 were created.
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Elements 113 and 115 Created 288 115, which lasted about 100 milliseconds…a very long time for this large an isotope. 288 115 emitted an α -particle, 4 He, to form 284 113. The results need to be confirmed.
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Why try to make elements that last such a short time? To support theories of the nature of matter. The standard model of the nature of matter predicts that elements with roughly 184 neutrons and 114 protons would be fairly stable. (See next slide.) 288 115, which lasted a relatively long time, has 115 protons and 173 neutrons.
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Band of Stability
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Why try to make elements that last such a short time? (cont.) The technology developed to make new elements is also being used for medical purposes. Heavy-ion therapy as a treatment for inoperable cancers Beams of carbon atoms shot at tumor. Heavier particle beam is less likely to scatter. Releases most of energy at end of path so easier to focus.
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To Describe Structure of Elements What particles? Noble gases – atoms Other nonmetals - molecules Diatomic elements – H 2 , N 2 , O 2 , F 2 , Cl 2 , Br 2 , I 2 S 8 , Se 8 , P 4 C(diamond) huge molecules Metallic elements – cations in a sea of electrons
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