"Radioactive Decay" Essays and Research Papers

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Radioactive Decay

Radioactive Decay, Nuclear Fission and Nuclear Fusion When elements undergo radioactive decay the atoms of one element are changed into the atoms of another element when an alpha or beta particle is emitted from an unstable nucleus. When a nucleus disintegrates and emits an alpha particle it is alpha decay, the alpha particle emitted contains two protons and two neutrons which is equivalent to a helium nucleus being released. Alpha decay occurs because there are too many protons, which causes...

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Radioactive Isotope

REVIEW VOCABULARY REVIEW radioactive isotope is an isotope whose nucleus tends to release particles, radiant energy, or both; radioactive dating is a technique for determining the age of a material by measuring the amount of a particular radioactive isotope the material contains. radioactive decay is the release of particles, radiant energy, or both by a radioactive isotope half-life is the time it takes for one-half of any size sample of a particular isotope to decay. microsphere is a spherical...

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Radioactive Isotopes

Radioactive Isotopes An isotope is one of two or more atoms with the same number of protons, and position in the periodic table, but different number of neutrons and physical properties. Isotopes have an unstable nucleus that decay suddenly by a release of nuclear electrons and radiation. This essay will be discussing one of the applications and uses of the radioactive isotopes, and it will also state one problem that radioactive isotopes can address. The radiation characteristically...

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Radioactive Isotopes

Radioactive Isotopes Radioactive isotopes are any of several species of the same chemical element with different masses whose nuclei are unstable and dissipate excess energy by spontaneously emitting radiation in the form of alpha, beta, and gamma rays. Every chemical element has one or more radioactive isotopes. More than 1,000 radioactive isotopes of the various elements are known.. Approximately 50 of the isotopes are found in nature; the rest are produced artificially as the direct products...

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Vanitas Exhibition: Theme of Decay

´╗┐What Once Was There In this Vanitas exhibition, the theme of decay will be used to relate 3 artworks, one traditional and two contemporary; specifically in relation to physical decay and historical decay. The three artists for these works have been precisely chosen to relate to Decay and encourage young audiences to understand how Vanitas relates to todays society. The three selected artworks will be presented in the gallery with a target audience of youth. Society itself is decaying when...

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Age of the Earth

conclusion was based upon carefully designed and conducted experiments that compared the ratios in rock samples of parent elements to daughter elements ( some of which would have been from radioactive decay of the parent, some of which may have been present in the sample at the time of formation). Since radioactive decay is known to occur at a constant rate, the age of a rock can be determined from the ratio of the parent element to the daughter element. The concerns about these dating methods were exactly...

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Chemistry Question Paper

iodine 131 can treat thyroid disorders (e.g. tumours) Iodine 131 has a half life of just over 8 days, emits beta particles and gamma rays as it decays. This half life is long enough for it to be transported form where it is produced to where it needs to be used but it is also short enough to minimise patients exposure to radiation It decays into non-radioactive gas, Xenon 131, which can easily escape without interfering bodily functions Beta particles can destroy abnormal tissue. Gamma rays allow external...

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Fossil Notes

Radiometric Dating is a technique that uses the natural decay rate of unstable isotopes found in materials in order to calculate the age of that material. (Done to calculate actual age of Fossil) c. Isotopes are atoms of an element that have the same number of protons, but a different number of neutrons. Isotopes are named by their number of protons plus their number of neutrons. C1. Isotopes with unstable nuclei have their nuclei undergo radioactive decay (break down) over time. This releases radiation...

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QUIZ EARTH SCIENCE

or may have changed hardly all over the time. 2. A type of fossils in which the sediments harden into rock and the organism decay slowly inside the rock, leaving a cavity in the shape of the organism. 3. The remains or traces of prehistoric life. 4. (2 points) the 2 conditions that are important for preservation. TEST VII 1. ______ is the spontneous breaking apart (decay) of certain unstable atomic nuclei. 2. Each atom has a nucleus containing ________ and ___________. 3. The _________ is the number...

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The use of radioisotopes

Cobalt 60 Mode of decay: Beta particles and gamma radiation Chemical properties: Metallic solid that can become magnetically charged What is it used for? Co-60 is used medically for radiation therapy as implants and as an external source of radiation exposure. It is used industrially in leveling gauges and to x-ray welding seams and other structural elements to detect flaws. Co-60 also is used for food irradiation (http://www.cdc.gov/ncidod/dbmd/diseaseinfo/ foodirradiation.htm), a sterilization...

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