What does Nuclear Chemistry Means?
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Nuclear chemistry deals with the composition of the nucleus of an atom and processes that change the nucleus composition.
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An isotope of the element Plutonium.  An isotope means that an electron has been removed from or added to the element's valence shell configuration.  Plutonium-210 is radioactive and emits particles (alpha particles, beta particles) and gamma radiation.  Alpha particles can be dangerous to a human if they come in contact with soft tissues (ie. swallowed, absorbed into wounds.)
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protons-nutrons-nucleus
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An atomic number is the number of protons in the nucelus of one atom of an element. This is used to identify each element as unique.
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Nuclear fusion is the process of creating usable energy by fusing, or combining, the nuclei of two light atoms (like deuterium) into the nucleus one heavier atom (like helium). This is the process that powers the Sun.\n\nSo-called "cold" fusion was a claim (since widely doubted) that this fusion of nuclei could be done chemically, without the high temperatures and pressures that most physicists believe is necessary for fusion to occur.\n\nFusion is a nuclear process, but it is quite different from conventional nuclear power, which is a process called "fission." In fission, a heavy nucleus, like Uranium or Plutonium, is split into two lighter "daughter" nuclei, releasing energy.
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I believe you already asked that a few days ago. But here is a refresher of the best answer yoy chose.:\nChemistry is Chemistry (derived from alchemy) is the science of matter and study of inner molecules and atoms. You study metal properties, its characteristics and behaviour. You study about Organic and InOrganic Materials. You will also learn about mixing chemicals - Reactants and Products. Don't worry now, it will soon become interesting.\n\nThe atomic mass of a chemical element is the mass of an atom at rest and Atomic number (Z) is the number of protons found in the nucleus of an atom.
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Chemistry is Chemistry (derived from alchemy) is the science of matter and study of inner molecules and atoms. You study metal properties, its characteristics and behaviour. You study about Organic and InOrganic Materials. You will also learn about mixing chemicals - Reactants and Products. Don't worry now, it will soon become interesting.\n\nThe atomic mass of a chemical element is the mass of an atom at rest and Atomic number (Z) is the number of protons found in the nucleus of an atom.
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Fusion combines two nuclei making a heavier partical (such as occurs on the sun or any star fusing two hydrogen nuclei into one helium--thus we get the word helios which refers to the sun.)\n\nFission is the breaking apart of one nucleus into two lighter particles. This is what occurs in a nuclear reactor.\n\nFor atomic or nuclear detonation, fission is the process. However, with a hydrogen bomb: fission is the beginning process which generates the necessary heat and force to begin the fusion process on hydrogen (as in what occurs on the sun) which results in a much bigger blast.
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Nuclear fission—also known as atomic fission—is a process in nuclear physics in which the nucleus of an atom splits into two or more smaller nuclei as fission products, and usually some by-product particles. Hence, fission is a form of elemental transmutation. The by-products include free neutrons, photons usually in the form gamma rays, and other nuclear fragments such as beta particles and alpha particles. Fission of heavy elements is an exothermic reaction and can release substantial amounts of useful energy both as gamma rays and as kinetic energy of the fragments (heating the bulk material where fission takes place).\n\nNuclear fission produces energy for nuclear power and to drive explosion of nuclear weapons. Fission is useful as a power source because some materials, called nuclear fuels, both generate neutrons as part of the fission process and also undergo triggered fission when impacted by a free neutron. Nuclear fuels can be part of a self-sustaining chain reaction that releases energy at a controlled rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.\n\nThe amount of free energy contained in nuclear fuel is millions of times the amount of free energy contained in a similar mass of chemical fuel such as gasoline, making nuclear fission a very tempting source of energy; however, the waste products of nuclear fission are highly radioactive and remain so for millennia, giving rise to a nuclear waste problem. Concerns over nuclear waste accumulation and over the immense destructive potential of nuclear weapons counterbalance the desirable qualities of fission as an energy source, and give rise to intense ongoing political debate over nuclear power.\n\nhere:http://en.wikipedia.org/wiki/Nuclear_fission#Physical_overview
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Tritium.\n\nThat is the isotope of hydrogen with one proton and two neutron in the nucleus.  It is used as a low grade radio-active activator in phosphorescent paint, replacing radium which is much more dangerous.\n\n(Science Teacher below is wrong: deuterium is a stable nucleon, it is thus not radio active)
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A substance whose atoms all have the same number of protons. Neutron numbers may vary (these are called "isotopes"). In a neutral (non-charged) atom, the number of electrons equals the number of protons.
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An induced nuclear fission event. A thermal (slow-moving) neutron is absorbed by the nucleus of a uranium-235 atom, which in turn splits into fast-moving lighter elements (fission products) and free neutrons. The particular elements and number of neutrons produced by each single fission event are random.Nuclear fission is a process in nuclear physics in which the nucleus of an atom splits into two or more smaller nuclei as fission products, and usually some by-product particles. Hence, fission is a form of elemental transmutation. The by-products include free neutrons, photons usually in the form gamma rays, and other nuclear fragments such as beta particles and alpha particles. Fission of heavy elements is an exothermic reaction and can release substantial amounts of useful energy both as gamma rays and as kinetic energy of the fragments.\n\nNuclear fission is used to produce energy for nuclear power and to drive explosion of nuclear weapons. Fission is useful as a power source because some materials, called nuclear fuels, both generate neutrons as part of the fission process and also undergo triggered fission when impacted by a free neutron. Nuclear fuels can be part of a self-sustaining chain reaction that releases energy at a controlled rate in a nuclear reactor or a very rapid uncontrolled rate in a nuclear weapon.\n\nThe amount of free energy contained in nuclear fuel is millions of times the amount of energy contained in a similar mass of chemical fuel such as gasoline, making nuclear fission a very tempting source of energy; however, the waste products of nuclear fission are highly radioactive and remain so for millennia, giving rise to a nuclear waste problem. Concerns over nuclear waste accumulation and over the immense destructive potential of nuclear weapons counterbalance the desirable qualities of fission as an energy source, and give rise to intense ongoing political debate over nuclear power.
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The expression "split an atom" usually refers to "splitting" the nucleus of an atom. A multi-nucleon nucleus to be sure; if it only has one nucleon then it can't be split as such. By "splitting" we mean separating a nuleus into smaller nuclei. The technical term is "fission".\n\nA nucleus is composed of particles called protons and neutrons, held together by a force called the "strong nuclear force" which only acts over "nucleonic distances". In "competition" with this force is the electronic repulsion of all the protons in the nucleus, hence the strong nuclear force has to be greater than the electronic repulsion to hold the nucleus together.\n\nAny nucleus with a certain number of protons and neutrons, has a certain stability (actually this is not a strictly correct statment, but it would require going into a lot further detail to make it more accurate), all nuclei naturally tend to become more stable and this is typically "achieved" by releasing various types of particles including:\n\ngamma-rays (electromagnetic radiation)\n\nbeta-particles (electrons emitted from a neutron within the nucleus which is consequntly now a proton).\n\nNeutrons\n\nAlpha-particles which are nuclei themselves composed of 2 neutrons and two protons, (since it has two protons this is actually a Helium nucleus).\n\nEmission of an alpha particle could be considerd as fission but the term more commonly refers to a nuclues splitting "nearly in half", i.e. into two very large nuclei.\n\nSo to finally answer your question, fission can be induced by causing a nucleus to absorb a particle such as a neutron or a photon, which makes the nucleus less stable, ie. more likey to fission sooner. In practice this can be achieved many ways, but most boil down to providing an appropriate type of radiation to an apropriate nucleus, such a neutron to a U-238 nucleus.
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A nuclear bomb is a weapon which derives its destructive force from nuclear reactions of fission or fusion. As a result, even a nuclear bomb with a relatively small yield is significantly more powerful than the largest conventional explosives, and a single bomb is capable of destroying an entire city.
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Radiology if the measurement of the radioactivity of a select element (like an isotope).\n\nBecause radioactivity is a property of atoms, radiology is a study of atomic behavior (the changes that take place in an atom).\n\nChemistry is the study of the atomic properties of elements, and the measurement of their changes when you do something to them.\n\nTherefore, in both radiology and chemistry, you are studying and measuring the atomic behavior of an element.
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In physics, nuclear fusion is the process by which multiple nuclei join together to form a heavier nucleus. It is accompanied by the release or absorption of energy depending on the masses of the nuclei involved. Iron and nickel nuclei have the largest binding energies per nucleon of all nuclei and therefore are the most stable. The fusion of two nuclei lighter than iron or nickel generally releases energy while the fusion of nuclei heavier than them absorbs energy; vice-versa for the reverse process, nuclear fission.\n\nNuclear fusion of light elements releases the energy that causes stars to shine and hydrogen bombs to explode. Nuclear fusion of heavy elements (absorbing energy) occurs in the extremely high-energy conditions of supernova explosions. Nuclear fusion in stars and supernovae is the primary process by which new natural elements are created. It is this reaction that is harnessed in fusion power.\n\nIt takes considerable energy to force nuclei to fuse, even those of the least massive element, hydrogen. But the fusion of lighter nuclei, which creates a heavier nucleus and a free neutron, will generally release more energy than it took to force them together — an exothermic process that can produce self-sustaining reactions.\n\nThe energy released in most nuclear reactions is much larger than that for chemical reactions, because the binding energy that holds a nucleus together is far greater than the energy that holds electrons to a nucleus. For example, the ionization energy gained by adding an electron to a hydrogen nucleus is 13.6 electron volts -- less than one-millionth of the 17 MeV released in the D-T (deuterium-tritium) reaction shown to the top right.\n\nThe steps of the main cycle of nuclear fusion in stars were worked out by Hans Bethe.
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radioactivity is the decay of an atom by emmision of radiation. Biotechnology is the use of biology to improve something, be it health or living conditions etc.