Chemicals and Drugs
HafniumLutetiumRadioisotopesSilicates
Relative percentage isotope abundancesYtterbiumUraniumPeriodic TableAbundancesElectron captureDecaysElectronsAbundantRadioisotopesNuclearAbundanceNaturallyNucleusNuclidesRatiosActinideUnstableBerkeliumNeutrons1949GermaniumTransuranium elementStable knownSilveryMassYttriumHeavierAtomsAtomic weightLongest-livedMetalOccursTransitionRadioactivityElementHalf-lifeActiniumWeakCalculateElementsTitaniumConsistsNatural
Relative percentage isotope abundances2
  • This is not to be confused with the relative percentage isotope abundances which totals 100% for all the naturally occurring isotopes. (webelements.com)
  • Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Home Questions Tags Users Unanswered Calculate the molar fraction of a mixture component given … If a mass spectrum of the element was given, the relative percentage isotope abundances are usually presented as a vertical bar graph. (schconsultores.com)
Ytterbium3
  • All of these researchers found lutetium as an impurity in the mineral ytterbia, which was previously thought to consist entirely of ytterbium. (wikipedia.org)
  • The primary decay products before Lu-175 are element 70 ( ytterbium ) isotopes and the primary products after are element 72 ( hafnium ) isotopes. (chemeurope.com)
  • Ytterbium is used in portable x-ray machines due to its radioactive properties and also used in earthquake monitoring stations. (purdue.edu)
Uranium4
  • 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)
  • 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)
  • It occurs naturally in minute quantities as an intermediate step in the normal radioactive decay chains through which thorium and uranium slowly decay into various short-lived radioactive elements and eventually into stable lead . (knowpia.com)
  • Since thorium and uranium are two of the most common radioactive elements on Earth, while also having three isotopes with half-lives on the order of several billion years, radon will be present on Earth long into the future despite its short half-life. (knowpia.com)
Periodic Table3
  • relative atomic mass calculations how to calculate the relative atomic mass The atomic mass listed for an element on the periodic table is an average mass of all known isotopes of that element. (schconsultores.com)
  • Silvery radioactive metallic element, belongs to group 3 of the periodic table. (ontologyportal.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)
Abundances3
  • By measuring the abundances of parent and daughter isotopes in rocks and minerals with extremely accurate mass spectrometers, Livermore scientists can measure the age of planetary materials with a margin of error of less than 1 percent. (llnl.gov)
  • This table shows information about naturally occuring isotopes , their atomic masses , their natural abundances , their nuclear spins , and their magnetic moments . (webelements.com)
  • Isotope abundances of hafnium. (webelements.com)
Electron capture2
  • The primary decay mode before the most abundant stable isotope, Lu-175, is electron capture (with some alpha and positron emission ), and the primary mode after is beta emission . (chemeurope.com)
  • 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)
Decays2
  • Its principal isotope is 227 and decays primarily by beta-emission. (harvard.edu)
  • A meta-stable isotope 176 Lu decays to its daughter nucleus 176 Hf with a half-life of approximately (3.5 − 4.1) × 10 10 yr (Fig. 1 ). (nature.com)
Electrons2
  • A lutetium atom has 71 electrons, arranged in the configuration [Xe] 4f145d16s2. (wikipedia.org)
  • The berkelium-249 isotope emits low-energy electrons and thus is relatively safe to handle. (wikiwand.com)
Abundant2
  • Lutetium is not a particularly abundant element, although it is significantly more common than silver in the earth's crust. (wikipedia.org)
  • Lutetium-176 is a relatively abundant (2.5%) radioactive isotope with a half-life of about 38 billion years, used to determine the age of minerals and meteorites. (wikipedia.org)
Radioisotopes2
  • Further data for radioisotopes (radioactive isotopes) of hafnium are listed (including any which occur naturally) below. (webelements.com)
  • In 1938, during a nuclear experiment conducted at Ohio State University , a few radioactive nuclides were produced that certainly were not radioisotopes of neodymium or samarium, but there was a lack of chemical proof that element 61 was produced, and the discovery was not generally recognized. (wikipedia.org)
Nuclear8
  • Nuclear forensics is central to the Laboratory's security missions, and cosmochemical work is key to developing techniques to measure isotopes that can be used to provide clues to the origin of illicit nuclear materials that might be diverted for use in weapons of mass destruction. (llnl.gov)
  • Curium is highly radioactive and is produced in nuclear reactors and particle accelerators. (thesaurus.net)
  • This table gives information about some radiosotopes of hafnium, their masses , their half-lives , their modes of decay , their nuclear spins , and their nuclear magnetic moments . (webelements.com)
  • As thorium is radioactive, its uses mainly lie in nuclear fuel applications. (byjus.com)
  • In nuclear industry boron is commonly used as a neutron absorber due to the high neutron cross-section of isotope 10B. (periodic-table.org)
  • The major isotope of berkelium, 249 Bk, is synthesized in minute quantities in dedicated high-flux nuclear reactors , mainly at the Oak Ridge National Laboratory in Tennessee , United States , and at the Research Institute of Atomic Reactors in Dimitrovgrad, Russia . (wikiwand.com)
  • It does not occur in nature and must be made in a nuclear reactor by neutron capture reactions from plutonium and americium isotopes. (webelements.com)
  • The new name meant "(nuclear) precursor tae actinium", [5] an implied thit actinium is a product o radioactive decay o protactinium. (wikipedia.org)
Abundance4
  • Naturally occurring Lutetium ( Lu ) is composed of 1 stable isotope Lu-175 (97.41% natural abundance). (chemeurope.com)
  • To calculate percentage abundance, we must first know the fractional abundance of each isotope. (schconsultores.com)
  • Where more than one isotope exists, the value given is the abundance weighted average. (rsc.org)
  • Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. (nuclear-power.com)
Naturally1
Nucleus2
  • The difference between the individual germanium isotopes lies in the number of neutrons in the nucleus. (chemlin.org)
  • The resulting impacts were of lower energy and the single nucleus of interest that formed needed to emit just three neutrons to lose its excess energy, leading to the heavier tennessine-294 isotope. (chemicool.com)
Nuclides1
  • The decay of radon produces many other short-lived nuclides , known as "radon daughters", ending at stable isotopes of lead . (knowpia.com)
Ratios2
  • This surprising result was found no matter where the astronauts collected samples and no matter what isotope ratios the Livermore sleuths measured-rubidium-87/strontium-87, samarium-147/neodymium-143 ( 147 Sm/ 143 Nd), samarium-146/neodymium-142 ( 146 Sm/ 142 Nd), lutetium-176/hafnium-176, or lead-207/lead-206. (llnl.gov)
  • A Livermore cosmochemistry team led by Borg measured the ages of lunar crustal rocks using isotope ratios in samples collected by several Apollo missions. (llnl.gov)
Actinide3
  • A trivalent radioactive element and the prototypical member of the actinide family. (harvard.edu)
  • Curium is a radioactive chemical element with the symbol Cm. It is named after Marie and Pierre Curie and is a member of the actinide series of elements. (thesaurus.net)
  • A radioactive actinide discovered in 1961. (nih.gov)
Unstable2
  • Lutetium metal is slightly unstable in air at standard conditions, but it burns readily at 150 °C to form lutetium oxide. (wikipedia.org)
  • Thorium is a weak radioactive metal as its isotopes are highly unstable. (byjus.com)
Berkelium2
  • Berkelium is a soft, silvery-white, radioactive metal. (wikiwand.com)
  • Berkelium is a radioactive rare earth metal, named after the University of California at Berkeley (USA). (shef.ac.uk)
Neutrons1
  • [a] One of its isotopes, 270 Hs, has magic numbers of both protons and neutrons for deformed nuclei, which gives it greater stability against spontaneous fission . (wikipedia.org)
19491
  • He chose the name lutecium for the new element, but in 1949 the spelling was changed to lutetium. (wikipedia.org)
Germanium3
  • List, data and properties of all known isotopes of Germanium. (chemlin.org)
  • The two following tables list the most important data and properties of the Germanium isotopes. (chemlin.org)
  • Further information on the individual Germanium isotopes is listed on separate pages and can be accessed via the link in column 1. (chemlin.org)
Transuranium element2
  • Other synonyms include radioactive metal, transuranium element, and synthetic element. (thesaurus.net)
  • It is the fourth transuranium element and is counted as one of the radioactive elements. (learnool.com)
Stable known2
  • its most stable known isotopes have half-lives of approximately ten seconds. (wikipedia.org)
  • The most stable known isotope , copernicium-285, has a half-life of approximately 30 seconds. (knowpia.com)
Silvery2
Mass6
  • relative atomic mass of an element for gcse how to calculate the % composition of isotopes in an element given its arithmetical algebra. (schconsultores.com)
  • Edexcel, OCR 21st century, Gateway science GCSE 9-1 chemistry examinations, On other pages relative atomic mass calculations) A level AND all their isotopes are highly radioactive and most are at O level chemistry a good website for free questions on Calculations of % composition of isotopes. (schconsultores.com)
  • percentage (%) of each isotope of an element in order to accurately mass of an element to help revise gcse If x and y were linearly correlated, we would expect all the points to fall on a straight line passing through the centroid. (schconsultores.com)
  • 1/12th the mass of a carbon-12 isotope (12C). (schconsultores.com)
  • There are twelve isotopes with mass numbers 252-262 and 266. (nih.gov)
  • The isotopic mass usually differs for other isotopes and is usually within 0.1 u of the mass number. (nuclear-power.com)
Yttrium2
  • Lutetium usually occurs in association with the element yttrium and is sometimes used in metal alloys and as a catalyst in various chemical reactions. (wikipedia.org)
  • An isotope of yttrium, Y90, is used in needles for certain surgical procedures. (purdue.edu)
Heavier1
Atoms1
  • The lutetium atom is the smallest among the lanthanide atoms, due to the lanthanide contraction, and as a result lutetium has the highest density, melting point, and hardness of the lanthanides. (wikipedia.org)
Atomic weight1
Longest-lived1
  • The longest-lived and second-most important isotope, 247 Bk, can be synthesized via irradiation of 244 Cm with high-energy alpha particles . (wikiwand.com)
Metal4
  • Tennessine is a synthetic radioactive metal and has only been produced in minute amounts. (chemicool.com)
  • Zirconium is a lustrous, grey-white, strong transition metal that resembles hafnium and, to a lesser extent, titanium. (viking.nu)
  • Californium is a radioactive metal. (rsc.org)
  • Curium is a radioactive rare earth metal. (webelements.com)
Occurs1
  • Lutetium occurs on the Earth in form of two isotopes: lutetium-175 and lutetium-176. (wikipedia.org)
Transition1
  • A strict application of the definition would describe also lutetium (Lu) as a transition element as it has a singly occupied 5 d orbital in its ground state. (citizendium.org)
Radioactivity2
  • Online radioactive decay calculator that allows you to find out the radioactivity decay in Strontium (Sr) 85. (easycalculation.com)
  • Online radioactive decay calculator that allows you to find out the radioactivity decay in Fluorine (F) 18. (easycalculation.com)
Element6
  • Lutetium is a chemical element with the symbol Lu and atomic number 71. (wikipedia.org)
  • Curium is a radioactive element with the atomic number 92. (thesaurus.net)
  • Radioactive metallic transuranic element, belongs to the actinoids. (ontologyportal.org)
  • Radioactive halogen element. (ontologyportal.org)
  • Radioactive metallic transuranic element. (ontologyportal.org)
  • The element wis first fund in 1913 bi Kazimierz Fajans an Oswald Helmuth Göhring an cried "brevium" acause o the short hauf-life o the speceefic isotope studied, i.e. protactinium-234m. (wikipedia.org)
Half-life6
  • the most stable such isotopes are lutetium-174 with a half-life of 3.31 years, and lutetium-173 with a half-life of 1.37 years. (wikipedia.org)
  • The most stable isotope, Ac-227, has a half-life of 217 years. (ontologyportal.org)
  • Am-243 is the most stable isotope, with a half-life of 7.95*10^3 years. (ontologyportal.org)
  • The process yielded the isotope californium-245 which has a half-life of 44 minutes. (rsc.org)
  • The most stable isotope is 247 Cm which has a half-life of 16 million years. (webelements.com)
  • Its most stable isotope , 222 Rn , has a half-life of only 3.8 days, making it one of the rarest elements. (knowpia.com)
Actinium2
  • In vitro dose effect relationships of actinium-225- and lutetium-177-labeled PSMA-I&T. Eur J Nucl Med Mol Imaging. (harvard.edu)
  • Àktíníọ̀m tabi Actinium je is a radioactive apilese kemika alagbararadio to ni ami-idamo Ac ati nomba atomu 89, to je wiwari ni odun 1899. (wikipedia.org)
Weak1
  • Lutetium dissolves readily in weak acids and dilute sulfuric acid to form solutions containing the colorless lutetium ions, which are coordinated by between seven and nine water molecules, the average being [Lu(H2O)8.2]3+. (wikipedia.org)
Calculate1
Elements1
  • The radioactive decay of isotopes of certain elements provides scientists with a powerful tool-the ability to measure the age of a material anywhere from seconds to billions of years old. (llnl.gov)
Titanium1
  • 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)
Consists1
  • chlorine is 75.77% 35Cl of 10.81 and consists of only two isotopes, boron-10 and boron-11. (schconsultores.com)
Natural1