what elements are radioactive
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What Is a Radioactive Element? All elements that have an atomic number higher than 83 are considered radioactive. These elements do not have stable isotopes, which is the primary thing that defines them as radioactive elements. The nuclei may degenerate at any period, which is known as the half life. While the half life varies from element to element, it provides a good probability of the life of a radioactive element. Radioactive element includes technetium, which has the most stable isotope and what is estimated as the longest half-life. The least stable element is ununoctium, which has a half-life of 1.8 milliseconds.
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Radium Radium is a chemical element with symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals. Pure radium is silvery-white, but it readily reacts with nitrogen on exposure to air, forming a black surface layer of radium nitride. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226, which has a half-life of 1600 years and decays into radon gas. When radium decays, ionizing radiation is a
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-   Plutonium (pronounced /pluːˈtoʊniəm/) is a rare radioactive, metallic and toxic chemical element. It has th … e symbol Pu and the atomic number 94. It is a fissile element used in most modern nuclear weapons. The most significant isotope of plutonium is 239Pu, with a half-life of 24,100 years.he radioactive metal plutonium is a rare-earth actinide from period 7 of the periodic table.
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Transuranium element Transuranium element. The transuranium elements (also known as transuranic elements) are the chemical elements with atomic numbers greater than 92 (the atomic number of uranium). All of these elements are unstable and decay radioactively into other elements. Contents.
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Actinide Radioactive elements: the most stable isotope has half-life between one day and 103 years. Highly radioactive elements: the most stable isotope has half-life between several minutes and one day. Extremely radioactive elements: the most stable isotope has half-life less than several minutes.
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UNITED STATES DEPARTMENT OF LABOR Radioactive materials are substances which spontaneously emit various combinations of ionizing particles (alpha and beta) and gamma rays of ionizing radiation to become more stable. This process is called radioactive decay. Radioisotopes are isotopes (same number of protons but different numbers of neutrons) which are radioactive.
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How many naturally occuring chemical elements are there on Earth? All chemical elements up to chemical element number 92, uranium, have been found naturally on earth with the exception of Technetium, atomic number 43. All elements above atomic number 92 are man made. Written Aug 16, 2015.
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- Radioactive materials used in medicine: radionuclides and radioactive isotopes. A radionuclide is any type of radioactive material, including elements and the isotopes of elements. An isotope of an element is a particular atomic version of it. Isotopes are atoms of the same element with different atomic structures.
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Dictionary of Radiation Terms Radon is a chemical element with symbol Rn and atomic number 86. It is a radioactive, colorless, odorless, tasteless noble gas. It occurs naturally as an intermediate step in the normal radioactive decay chains through which thorium and uranium slowly decay into lead; radon, itself, is a decay product of radium.
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radioactive isotope radioactive isotope. radioactive isotope or radioisotope, natural or artificially created isotope of a chemical element having an unstable nucleus that decays, emitting alpha, beta, or gamma rays until stability is reached.he stable end product is a nonradioactive isotope of another element, i.e., radium-226 decays finally to lead-206. Very careful measurements show that many materials contain traces of radioactive isotopes.
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- Elements that decay (give off protons and neutrons) to form other elements. *It's not elements as such that are stable or unstable, but rather isotopes. Even elements of small … atomic number have unstable isotopes that undergo radioactive decay, for example carbon-14.or some elements no radioactive isotopes are known except those that are synthetic (see link to related question below). For some other elements, there are both radioactive isotopes and stable isotopes in nature. (see link to related question below).
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Radioactive Elements (38) These elements are radioactive. They either have no stable naturally occurring isotope, or else are entirely artificial (all artificial elements have no stable isotopes). Click any element tile below to get the full entry for that element, or click on the sample picture to go directly to the description of that sample.hese elements are radioactive. They either have no stable naturally occurring isotope, or else are entirely artificial (all artificial elements have no stable isotopes). Click any element tile below to get the full entry for that element, or click on the sample picture to go directly to the description of that sample.
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- Radium is a radioactive metal occurring naturally in trace (small) amounts in rocks, soils, and ground water. As radium decays, it continually releases energy into the environment and transforms until a stable, nonradioactive substance is formed.adium is a radioactive metal occurring naturally in trace (small) amounts in rocks, soils, and ground water. As radium decays, it continually releases energy into the environment and transforms until a stable, nonradioactive substance is formed.
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What Is the Most Radioactive Element? All of the elements from element 84 on up are extremely radioactive. These elements have no stable isotopes. Because it is a naturally-occurring element that releases a huge amount of energy, many sources cite polonium as the most radioactive element. Polonium is so radioactive is glows blue, which is caused by excitation of the gas particles by radiation. A single milligram of polonium emits as many alpha particles as 5 grams of radium.
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- Plutonium is a radioactive element used in nuclear weapons and power plant generators. It is very toxic when inhaled and can damage organs, bones, and sometimes cause lung. cancer. Plutonium is a silver-white color. Plutonium - a radioactive, silvery metal that is used in nuclear weapons.
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Seizures inked to ear infections??????? Yes ear infections can cause seizures. My son has a very high tollerance to pain and the only time I knew he has an ear infection was when his seizure were way out of control and we brought him to the hospital. he would have a real bad ear infection. Now I have one of those light to look into the ear.
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Barely Radioactive Elements Getting back to the original question, was the non-professional's guess that lead is the heaviest stable element correct? Well, not so fast…. Naturally occurring lead is composed of four isotopes: lead-204, lead-205, lead-207, and lead-208, with the latter making up more than half.
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- Every food has some small amount of radioactivity in it. The common radionuclides in food are potassium 40 (40K), radium 226 (226Ra) and uranium 238 (238U) and the associated progeny. Here is a table of some of the common foods and their levels of 40K and 226Ra.
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Can you die with a pacemaker? pacemakers fire to jump start the heart, but yes you can die if you have a pacemaker, the pacemaker can still fire for a long period of time after death but the heart doesnt respond to the signal. after death and the batteries die the pacer will stop. also a magnet placed over the pacer will de activate it.
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Period 6 element Lead has the highest atomic number of any non-radioactive element, although the next higher element, bismuth, has one isotope with a half-life that is long enough (over one billion times the estimated age of the universe) to be considered stable for practically all purposes.
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- Roentgenium is a transuranium element which decays radioactively. Other such elements are curium, americium, plutonium, nobelium, and fermium. Such elements are produced in small amounts, with few exceptions. Elements with an atomic number higher than 110, Roentgenium in this number, are classified as super heavy. They are usually created through nuclear fission, and a particle accelerator is used. Discovery and Naming
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- Radioactive decay, also known as nuclear decay or radioactivity, is the process by which a nucleus of an unstable atom loses energy by emitting radiation.A material that spontaneously emits such radiation — which includes alpha particles, beta particles, gamma rays and conversion electrons — is considered radioactive.lpha decay occurs when the nucleus ejects an alpha particle (helium nucleus). This is the most common process of emitting nucleons, but in rarer types of decays, nuclei can eject protons, or in the case of cluster decay specific nuclei of other elements.
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Nobelium A radioactive metal, it is the tenth transuranic element and is the penultimate member of the actinide series. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. radioactive metal, it is the tenth transuranic element and is the penultimate member of the actinide series. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles.
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Radon Radon is a chemical element with symbol Rn and atomic number 86. It is a radioactive, colorless, odorless, tasteless noble gas. It occurs naturally as an intermediate step in the normal radioactive decay chains through which thorium and uranium slowly decay into lead; radon, itself, is a decay product of radium. Its most stable isotope, 222Rn, has a half-life of 3.8 days.
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- Thorium is weakly radioactive: all its known isotopes are unstable, with the seven naturally occurring ones (thorium-227, 228, 229, 230, 231, 232, and 234) having half-lives between 25.52 hours and 14.05 billion years.horium is also used as an alloying element in TIG welding electrodes. It remains popular as a material in high-end optics and scientific instrumentation; thorium and uranium are the only radioactive elements with major commercial applications that do not rely on their radioactivity.
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- Plutonium is a radioactive metallic element with the atomic number 94. It was discovered in 1940 by scientists studying how to split atoms to make atomic bombs.Plutonium is created in a reactor when uranium atoms absorb neutrons. Nearly all plutonium is man-made.Plutonium predominantly emits alpha particles – a type of radiation that is easily stopped and has a short range. It also emits neutrons, beta particles and gamma rays.lutonium is created in a reactor when uranium atoms absorb neutrons. Nearly all plutonium is man-made. Plutonium predominantly emits alpha particles – a type of radiation that is easily stopped and has a short range. It also emits neutrons, beta particles and gamma rays.