2. As the fragment falls through the atmosphere, it is heated and some of the ma
ID: 2187182 • Letter: 2
Question
2. As the fragment falls through the atmosphere, it is heated and some of the material is vaporized. Explain how you could determine the composition of this hot vaporized material from the light it emits. 3. Some asteroid fragments are large enough to not completely burn up in the atmosphere and they end up on the surface of the Earth. It is possible for such a fragment to be radioactive. What is the chief cause of radioactivity? If you had a radiation detector that could measure the amount of radiationExplanation / Answer
the composition can be determined by the wavelength of light emitted when the material is burnt. yes there is a possibility for radioactivity. Atoms found in nature are either stable or unstable. An atom is stable if the forces among the particles that make up the nucleus are balanced. An atom is unstable (radioactive) if these forces are unbalanced if the nucleus has an excess of internal energy. Unstable atoms are called radionuclides. The instability of a radionuclide's nucleus may result from an excess of either neutrons or protons. An unstable nucleus will continually vibrate and contort and, sooner or later, attempt to reach stability by some combination of means: ejecting neutrons, and protons converting one to the other with the ejection of a beta particle or positron the release of additional energy by photon (i.e., gamma ray) emission. by measuring the number of alpha beta particles and determining the sequence of the emissions.
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