Radioactive decay is the process by which an atomic nucleus of an unstable atom loses energy by emitting ionizing particles (ionizing radiation). There are many different types of radioactive decay (see table below). A decay‚ or loss of energy‚ results when an atom with one type of nucleus‚ called the parent radionuclide‚ transforms to an atom with a nucleus in a different state‚ or to a different nucleus containing different numbers of protons and neutrons. Either of these products is named the
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Properties: Member of the Lanthanide Family Heat of Vaporization: 289 kJ/mol Molar Volume: 19.95 cm^3/mole Chemical Properties: Electronegativity: -1.13 (Pauling)‚ -1.07 (Allrod Ronchow) 9 isotopes All isotopes are radioactive Isotopes: 9 isotopes‚ although none of them are stableWho Discovered Your Element?: J.A. Marinsky‚ Lawerence Glendenin‚ and Charles D. CoryellWhat Year Was Your Element Discovered?: 1945What Was Your Element First Used For?: Nuclear powered
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This element was originally named niton after the latin word for shining like nitons. Radon means or chemical element of atomic number of 86 and rare radioactive gas by the following of noble gas. The atomic mass is 222 for this element. There is 86 protons a nice almond and 136 neutrons. There is usually today eight electrons pair a shell. This element is a nonmetal and that means that it This element is a nonmetal and that means that it doesn’t have anything to do with a metal substance.
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form of radiometric dating which tells us the absolute age of rocks. Practically all elements are radioactive to some extent‚ some more than others. Moreover‚ different isotopes of elements are more radioactive than others. Isotopes are forms of a particular atom that varies in the number of neutrons in the nucleus. For instance‚ K-40 is a naturally occurring isotope of Potassium is far more radioactive than its siblings K-39 and K-41 because K-40 is much less stable. K-40 has a half-life of approximately
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controversial. Many say the dangers of using radioactive materials on human bodies are far more negative than positive. Others strongly agree with the use of radiochemistry in the field of medicine. Nuclear medicine is in the field of medicine by using imaging devices. Doctors use small amounts of radioactive materials called radio tracers that are either injected into the bloodstream‚ inhaled or swallowed. Radiation therapy is also a therapy that uses radioactive materials to treat cancers. The use of
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Ruthenium often called its symbol‚ Ru‚ which atomic number is 44 and the atomic mass is 101.07 u ± 0.02 u. This element is known to have 27 radioactive isotopes but 7 regular isotopes. Ruthenium is solid at room temperature and looks like a hard‚ silvery-white metal with a shiny surface ( See page 2 for picture. ).The 3 main types of subatomic particles are protons‚ neutrons‚ and electrons. To humans Ruthenium is highly toxic and carcinogenic‚ and shouldn’t be touched if came into contact with.
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around the world such as medicine‚ industry and research. * They consist of a radioactive isotope of any element Technetium-99m: * Half life: * The half life of Technetium-99m is 6 hours * Below is a diagram of the decay of Technetium-99m: * What type of radiation is emitted? * Gamma 140 keV is emitted from Technetium-99m in the process of decaying. * Describe the process in which the isotope is used: * Technetium-99m is used in medicine. It is used around 20 million
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function is written as f(x)=ex. Its inverse‚ the natural logarithmic function‚ is written as f(x)=ln(x). The decay of radioactive substances can be represented by using an exponential function. The mass of the radioactive substance will decrease as time passes‚ but the rate of decay and the mass of the substance will always remain directly proportional. The decay of radioactive substances can be expressed by the function m(t)=m0e-rt‚ where m(t) represents the mass remaining at time t‚ r represents
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during this process. After decaying‚ radioactive atoms “change” into other atoms Why does the atom do this? -the nucleus of an atom attempts to become more stable -In some instances‚ a new element is formed and in other cases‚ a new form of the original element‚ called an isotope‚ appears. This process of change is often referred to as the decay of atoms. * The rate of Radioactive decay is described in half-lives. * Energy is released during radioactive decay Types of Nuclear Radiation
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enough energy to ionize atoms in the material it interacts with. Examples of non-ionizing radiation include: • microwaves • visible light • radio waves • TV waves • Ultraviolet radiation (except for the very shortest wavelengths) The earth has been radioactive ever since its formation into a solid mass over 4½ billion years ago. However‚ we have only known about radiation and radioactivity for just over one hundred years. [One hundred and four years and 10 months to be exact.] You are probably familiar
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