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The excess energy associated with this excited state is released when the nucleus emits a photon in the -ray portion of the electromagnetic spectrum.Most of the time, the -ray is emitted within 10Nuclides with atomic numbers of 90 or more undergo a form of radioactive decay known as spontaneous fission in which the parent nucleus splits into a pair of smaller nuclei.These remains include the fossils (preserved bones) of humans, food remains, the ruins of buildings, and human artifactsitems such as tools, pottery, and jewelry.

Voltaire died in 1778, but since that time the world has been flooded with millions upon millions of printed copies of the Bible in hundreds of languages and dialects.Electron capture leads to a decrease of one in the charge on the nucleus.The energy given off in this reaction is carried by an x-ray photon, which is represented by the symbol hv, where h is Planck's constant and v is the frequency of the x-ray."Archaeology is the science of rubbish." -archaeologist Stuart Piggot The Forma Urbis Romae may just be the world's biggest jigsaw-puzzle.Carved across marble slabs 45 feet high and 60 feet long, it is a map ancient Rome showing every street, building, room, and staircase.With its focus on the ancient past, archaeology somewhat resembles paleontologythe study of fossils of long-extinct animals, such as dinosaurs.

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