Radioactivity
Radioactivity is a physical process that includes emitting of radiations from unstable atoms. These atoms achieve stability through the process of radioactive decay. A radioactive atom emits energy and particles during its decomposition which are referred to as radiations. Radioactive decay can be natural or induced. Natural radioactive decay includes natural decomposition of radioactive atoms. It is categorised into three categories namely alpha radiation, beta radiation and gamma radiation.
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Radioactive Waste
Radioactive waste includes waste materials produced during the process of radioactive decay. It is categorised into various groups on the basis of its level of harmfulness to people. Some of them are as following.
Exempt waste and very low level radioactive waste includes the waste that are least or even not harmful to people and surroundings. Low level radioactive waste is generated in hospitals and nuclear fuel cycle that contain very small amount of short living radioactive decay.
Intermediate level radioactive waste contain relatively higher amount of nuclear decay and should be managed to avoid its harmful effects. High level radioactive waste is produced in nuclear reactors and as the name suggests it has very high level of nuclear decay and is very harmful to people and environment if not managed properly.
What is Radioactivity
Radio-activity is feature of some unstable atomic nucleus that emits radiations spontaneously. These unstable nuclei do so in order to achieve a stable configuration. Hence they emit some energy in form of radiations. Ability of these nuclei to emit radiations spontaneously is referred to as nuclear decay. Say for example, an atomic nucleus has too many neutrons. These excess neutrons make this nucleus unstable.
Hence this nucleus emits a negatively charged beta particle and thereby converting one neutron into proton. Likewise an atom with excess protons emit positron and thereby converts one proton into neutron. Hence the atom gets rid of excess subatomic particles by emitting radiations. The whole process is referred to as nuclear decay.Is this topic Equation for Kinetic Energy hard for you? Watch out for my coming posts.
Radioactivity Definition
Nuclear decay is a physical process defined as ability of atoms to emit radiations spontaneously.
Who Discovered Radioactivity
H. Becquerel discovered radioactive decay during his studies on properties of X-rays. He demonstrated that atoms of Uranium have ability to emit radiations spontaneously without any external energy source.
Later M. Curie and her husband Pierre coined the term “radioactivity”. They showed that ore of Uranium had more radioactive decay than the pure Uranium. This was due to the presence of other radioactive elements in the ore namely polonium and radium.
Showing posts with label Radioactivity. Show all posts
Showing posts with label Radioactivity. Show all posts
Wednesday, April 17, 2013
Thursday, December 20, 2012
Marie Curie Radioactivity
Introduction to Marie Curie radioactivity
The study of nuclear physics began when Becquerel discovered radioactivity in 1869, just one year after the discovery of X-rays. He found that accidentally, that an ore containing uranium emits an invisible radiation that can penetrate a black paper wrapper and expose a photographic plate. The rays are called as radioactive rays. Madam Marie Curie and her husband Pierre Curie conducted the most significant investigation in the field of radioactivity. After several years of careful and the laborious chemical separation process on tons of pitchblende, a radioactive ore, the Marie Curie reported the discovery of two previously unknown elements, both of them were radioactive. These were named polonium and radium. Madam Marie Curie was awarded Nobel Prize in 1903 for the discovery of radium. I like to share this Curie Law with you all through my article.
Marie Curie Radioactivity
Radioactivity is the spontaneous phenomenon exhibited by the heavy elements only. It is the property of the heavy elements, which disintegrates itself without being forces by any external agent. The total number of radioactive elements known at present is about 40. The natural elements with atomic number more than 82 are all radioactive, for example, Radium, Thorium, Actinium, Polonium etc. The phenomenon of radioactivity is not affected by pressure, temperature, chemical changes etc. The electrons orbiting around the nucleus are not responsible for the phenomenon of radioactivity. Please express your views of this topic Instantaneous Velocity Equation by commenting on blog.
Laws of Marie Curie Radioactivity
The laws of Marie Curie radioactivity are as follows:
(i) Radioactivity is a spontaneous process, which does not depend upon external factors like temperature, pressure etc.
(ii) During disintegration of an atom, either an alpha particle or a beta particle is emitted. Both of these particles are never emitted simultaneously. At a time, an atom will not emit more than one alpha particle or more than one beta particle.
(iii) The emission of alpha particle from an atom will change it into a new atom whose mass number is reduced by 4 and the atomic number be reduced by 2.
(iv) The emission of beta particle from an atom will change it into a new atom whose mass number remains same and the atomic number be increased by 1.
The study of nuclear physics began when Becquerel discovered radioactivity in 1869, just one year after the discovery of X-rays. He found that accidentally, that an ore containing uranium emits an invisible radiation that can penetrate a black paper wrapper and expose a photographic plate. The rays are called as radioactive rays. Madam Marie Curie and her husband Pierre Curie conducted the most significant investigation in the field of radioactivity. After several years of careful and the laborious chemical separation process on tons of pitchblende, a radioactive ore, the Marie Curie reported the discovery of two previously unknown elements, both of them were radioactive. These were named polonium and radium. Madam Marie Curie was awarded Nobel Prize in 1903 for the discovery of radium. I like to share this Curie Law with you all through my article.
Marie Curie Radioactivity
Radioactivity is the spontaneous phenomenon exhibited by the heavy elements only. It is the property of the heavy elements, which disintegrates itself without being forces by any external agent. The total number of radioactive elements known at present is about 40. The natural elements with atomic number more than 82 are all radioactive, for example, Radium, Thorium, Actinium, Polonium etc. The phenomenon of radioactivity is not affected by pressure, temperature, chemical changes etc. The electrons orbiting around the nucleus are not responsible for the phenomenon of radioactivity. Please express your views of this topic Instantaneous Velocity Equation by commenting on blog.
Laws of Marie Curie Radioactivity
The laws of Marie Curie radioactivity are as follows:
(i) Radioactivity is a spontaneous process, which does not depend upon external factors like temperature, pressure etc.
(ii) During disintegration of an atom, either an alpha particle or a beta particle is emitted. Both of these particles are never emitted simultaneously. At a time, an atom will not emit more than one alpha particle or more than one beta particle.
(iii) The emission of alpha particle from an atom will change it into a new atom whose mass number is reduced by 4 and the atomic number be reduced by 2.
(iv) The emission of beta particle from an atom will change it into a new atom whose mass number remains same and the atomic number be increased by 1.
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