All of the remaining radioactive isotopes have half-lives that are less than 4 days and the majority of these have half-lives that are less than 10 minutes. (wikipedia.org)
Promethium is one of only two radioactive elements that are followed in the periodic table by elements with stable forms, the other being technetium . (wikipedia.org)
Although radioactive ruthenium-106 attracted attention, non-radioactive ruthenium isotopes were also detected, which Klein realized could be a key factor in identifying the source of the material. (qsstudy.com)
The radioactive isotopes are altered over time, emitting radiation in the form of alpha rays (helium nuclei), beta rays (electrons or positrons energy and speed) or gamma (high frequency energy of the electromagnetic spectrum). (examplespedia.com)
The half - life is the parameter indicating the time it takes to disintegrate half of the mass of a radioactive isotope. (examplespedia.com)
Some of the radioactive isotopes are not found in nature but are created by mankind in controlled environments such as laboratories. (examplespedia.com)
Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. (viking.nu)
Because of the specificity of its uptake by the human body, radioactive isotopes of iodine can also be used to treat thyroid cancer . (wikipedia.org)
Cerium, lanthanum, neodymium, and praseodymium, commonly in the form of a mixed oxide known as mischmetal, are used in steel making to remove impurities and in the production of special alloys. (knowinsiders.com)
Thorium5
When pure, thorium is a silvery-white metal which is air-stable and retains its luster for several months. (thermopedia.com)
These mantles, consisting of thorium oxide with about 1% cerium oxide and other ingredients, glow with a dazzling light when heated in a gas flame. (thermopedia.com)
Twelve isotopes of thorium are known with atomic masses ranging from 223 to 234. (thermopedia.com)
For example, beryllium (Be), niobium (Nb), lanthanum (La), cerium (Ce) and thorium (Th) etc. are more likely to be detected in Madagascar sapphires. (ssef.ch)
Hoffman chose to look for plutonium in these ores since she expected that the geochemistry of plutonium dioxide would be very similar to the geochemistry of thorium dioxide and cerium dioxide minerals, both of which are significant constituents of most lanthanide ores. (atomicinsights.com)
Uranium1
The two sources of natural promethium are rare alpha decays of natural europium -151 (producing promethium-147) and spontaneous fission of uranium (various isotopes). (wikipedia.org)
Ratios1
The ratios of stable ruthenium isotopes are consistent with the fuel cycle with high plutonium content, which, surprisingly, probably indicates a civilian site. (qsstudy.com)
Promethium2
Promethium shows only one stable oxidation state of +3. (wikipedia.org)
Promethium-145 is the most stable promethium isotope, but the only isotope with practical applications is promethium-147, chemical compounds of which are used in luminous paint , atomic batteries and thickness-measurement devices. (wikipedia.org)
The alloy, which combines aluminum with cerium and other metals, was printed using a laser powder bed system that deposits one thin layer of material at a time for precise results. (ornl.gov)
Atomic Weights1
The primary decay products at atomic weights below 45 Sc are calcium isotopes and the primary products from higher atomic weights are titanium isotopes. (wikimili.com)
Atoms3
Stable cerium atoms that have the same atomic number as the element cerium, but differ in atomic weight. (umassmed.edu)
Stable mercury atoms that have the same atomic number as the element mercury, but differ in atomic weight. (harvard.edu)
The stable isotopes are atoms of the same element that have extra neutrons but need not give off energy or particles to remain in balance. (examplespedia.com)
Plutonium2
Plutonium isotopes are expensive and inconvenient to separate, so particular isotopes are usually manufactured in specialized reactors. (everipedia.org)
Plutonium is the heaviest primordial element by virtue of its most stable isotope , plutonium-244 , whose half-life of about 80 million years is just long enough for the element to be found in trace quantities in nature. (infogalactic.com)
Earth's1
Kleine said in a statement, "We usually measure ruthenium isotopes to study the history of Earth's formation. (qsstudy.com)
Selenium1
Selenium and stable mercury isotopes provide new insights into mercury toxicokinetics in pilot whales. (harvard.edu)
Radiation1
The glass blocks are stabilized against damage from radiation by introducing cerium in varying levels. (cgcri.res.in)
Naturally1
Cesium is present naturally in the soil and also as isotope 133. (diethealthclub.com)
Electron1
The primary decay mode at masses lower than the only stable isotope, 45 Sc, is electron capture , and the primary mode at masses above it is beta emission . (wikimili.com)
Alloys1
We expected notable improvements, but were surprised by how strong and stable these alloys proved to be. (ornl.gov)
It is the least abundant of the stable halogens , being the sixty-first most abundant element. (wikipedia.org)
Concentrations3
It was Klein and colleagues who gained experience studying samples with small isotope concentrations, a skill that yielded less ruthenium than the filters they could access from Austrian measuring stations. (qsstudy.com)
Elevated Mercury Concentrations and Isotope Signatures (N, C, Hg) in Yellowfin Tuna (Thunnus albacares) from the Galápagos Marine Reserve and Waters off Ecuador. (harvard.edu)
Mercury Stable Isotopes Reveal Influence of Foraging Depth on Mercury Concentrations and Growth in Pacific Bluefin Tuna. (harvard.edu)
MeSH2
Cerium Isotopes" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (umassmed.edu)
Mercury Isotopes" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (harvard.edu)
Compounds1
Sample compounds that contain Cerium are CeO2, [Ce(NH3)6][FeCl4]3, CeB6, Ce(SO4)2, Ce2(SO4)3, Ce(IO3)4. (webqc.org)
Mass1
In isotopes, these give the atom a greater atomic mass (A), a property that is calculated with protons and neutrons. (examplespedia.com)
Element2
Cerium is an element number 58 from n/a family. (webqc.org)
In nuclear industry boron is commonly used as a neutron absorber due to the high neutron cross-section of isotope 10B. (periodic-table.org)
Decay2
Modes of decay: Bold symbol as daughter - Daughter product is stable. (wikipedia.org)
Th 232 goes through six alpha and four beta decay steps before becoming the stable isotope Pb 208 . (thermopedia.com)
Elements1
Cerium is also traditionally considered one of the rare-earth elements. (viking.nu)
Temperatures1
ORNL researchers used a laser power bed manufacturing technique to 3D print a lightweight aluminum and cerium-based alloy that can withstand temperatures up to 300 degrees Celsius, proving high strength and durability for automotive, aerospace and defense applications. (ornl.gov)
Year2
This graph shows the total number of publications written about "Cerium Isotopes" by people in this website by year, and whether "Cerium Isotopes" was a major or minor topic of these publications. (umassmed.edu)
This graph shows the total number of publications written about "Mercury Isotopes" by people in Harvard Catalyst Profiles by year, and whether "Mercury Isotopes" was a major or minor topic of these publication. (harvard.edu)
Study2
Mercury isotope study of sources and exposure pathways of methylmercury in estuarine food webs in the Northeastern U.S. Environ Sci Technol. (harvard.edu)
Stable isotope (N, C, Hg) study of methylmercury sources and trophic transfer in the northern gulf of Mexico. (harvard.edu)