"Isotope" Essays and Research Papers

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Atomic Theory

September 2011 ISOTOPES Atoms of a given element which have the same number of protons but different numbers of neutrons are called isotopes. Thus, isotopes have the same position in the periodic table, the same chemical properties and the same atomic charge. The simplest example of an atom with different isotopes is hydrogen. The three isotopes of hydrogen are shown here: The increasing number of neutrons in the nucleus of the hydrogen atom adds mass to the atom and thus each isotope of a given...

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Chemical Element and Atomic Weights

weights. Isotopes are variants of atoms of a particular chemical element, which have differing numbers of neutrons. Atoms of a particular element by definition must contain the same number of protons but may have a distinct number of neutrons which differs from atom to atom, without changing the designation of the atom as a particular element. The number of nucleons (protons and neutrons) in the nucleus, known as themass number, is not the same for two isotopes of any element. For example...

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Exam I Master

Which of the following statements about isotopes is TRUE? A) Isotopes of the same element differ only in the number of electrons they contain. B) An isotope of an atom with a larger number of neutrons is larger than an isotope of the same atom that contains fewer neutrons. C) Isotopes of the same element have the same mass. D) Isotopes of the same element don't usually have the same properties. E) Some elements have 3 or more naturally occurring isotopes. Answer: E 3) Determine the number of...

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Radioisotopes

How Are They Made?What are isotopes?The isotopes of an element are all the atoms that have in their nucleus the number of protons (atomic number) corresponding to the chemical behavior of that element. However, the isotopes of a single element vary in the number of neutrons in their nuclei. Since they still have the same number of protons, all these isotopes of an element have identical chemical behavior. But since they have different numbers of neutrons, these isotopes of the same element may have...

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Chemistry Notes

based on how the mers are joined together. * Addition – mers joined without the loss of atoms (presence of unsaturated carbons). * Condensation – mers joined through the loss of atoms from the functional groups of each monomer. Radioactive isotopes: * Everything with an atomic number over 82 is radioactive. * Unstable nuclei; too many neutrons:protons, large nuclei * Cobalt 60 formed by neutron bombardment. Detection: * Photographic film – exposes film * Geiger counter...

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Dalton's Theory

Atoms combine in whole number ratios to form compounds and if these proportions differ, so will the compound. However, the modern Atomic Theory provides evidence that disproves some of Dalton's Theory: 1. Atoms of the same element can differ (isotopes and ions). 2. Atoms are divisible. we know atoms are made of smaller parts, and you can break them down in nuclear (not chemical) reactions, but overall Dalton set up a great base of knowledge for the next group of atomic scientists to build...

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isotops in agriculture

Isotopes in Agriculture An isotope is a two or more atom that has different mass number but the same atomic number. An isotope is a variation of an element with a difference in the normal number of neutrons. The increased mass of an isotope can cause the chemical reactions they are used in to progress more slowly than a reaction that does not use isotopes. Not all isotopes are radioactive and there are many uses for them. They can be used in medicine, diagnose, nutrition, agriculture, research...

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Biology Radioisotopes

Radioactive isotopes (radioisotopes) are isotopes which are atoms of the same element that are chemically identical but vary in the number of neutrons they contain. Radioactive isotopes can participate in reactions just like non radioactive elements. Autoradiography is a technique used to trace the movements of certain substances around plants. An example of this is carbon 14. Carbon 14, a radioactive isotope,is added to the carbon dioxide supply of the plant, to study the movement of products...

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Beanium Lab Report

Purpose The purpose of the “Beanium” lab was to determine the average atomic mass of three different isotopes of beanium. During the lab beans were counted to determine mass of the sum of the beans. Each type of bean were weighed separately and then averaged together to determine the average atomic mass of beanium. Materials and Hazards Analytical balance, coffee filter, pencil, paper, cup, American beans, Nigerian beans, Mexican beans, calculator, and paper. Raw Data Bean Total Mass w/ Cup Number...

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Reactor Physics

. . . . . . . . . . . . . Structure of Matter . . . . . . . . . . . . . Subatomic Particles . . . . . . . . . . . . . Bohr Model of the Atom . . . . . . . . . Measuring Units on the Atomic Scale Nuclides . . . . . . . . . . . . . . . . . . . . . Isotopes . . . . . . . . . . . . . . . . . . . . . Atomic and Nuclear Radii . . . . . . . . Nuclear Forces . . . . . . . . . . . . . . . . Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

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