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promethium    音标拼音: [prəm'iθiəm]
n. 烯土类元素

烯土类元素

promethium
n 1: a soft silvery metallic element of the rare earth group
having no stable isotope; was discovered in radioactive
form as a fission product of uranium [synonym: {promethium},
{Pm}, {atomic number 61}]


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  • Promethium - Wikipedia
    Promethium is a chemical element; it has symbol Pm and atomic number 61 All of its isotopes are radioactive; it is extremely rare, with only about 500–600 grams naturally occurring in the Earth's crust at any given time
  • Promethium | Rare Earth Element, Atomic Number 61 | Britannica
    promethium (Pm), chemical element, the only rare-earth metal of the lanthanide series of the periodic table not found in nature on Earth
  • Promethium - Element information, properties and uses | Periodic Table
    Element Promethium (Pm), Group 19, Atomic Number 61, f-block, Mass [145] Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images
  • Facts About Promethium - Live Science
    Named for the Greek Titan who stole fire from Zeus and gave it to humanity, glow-in-the-dark promethium is a highly radioactive, rare earth element It is not found anywhere on Earth and is found
  • Promethium Facts - Periodic Table of the Elements
    Promethium is a radioactive rare earth metal Here's a collection of interesting promethium element facts: The original spelling of the name promethium was prometheum The element is named for Prometheus, the Titan who stole fire from the Greek gods to give to mankind
  • Promethium Facts, Symbol, Discovery, Properties, Uses - Chemistry Learner
    Promethium (pronounced as pro-MEE-thee-em) is a radioactive metal with the chemical symbol Pm, belonging to the family of lanthanides as it does not exist naturally in the earth’s crust [1, 3]
  • Promethium(Pm) – Definition, Preparation, Properties, Uses . . . - Examples
    What is Promethium? Promethium is a chemical element with the symbol Pm and atomic number 61, making it one of the rare earth elements within the lanthanide series of the periodic table It is unique among the lanthanides as it does not occur in significant amounts in the earth’s crust in a natural, stable form due to its highly radioactive
  • Promethium | Pm (Element) - PubChem
    Promethium is a chemical element with symbol Pm and atomic number 61 Classified as a lanthanide, Promethium is a solid at 25°C (room temperature) J C Slater, J Chem Phys, 1964, 41 (10), 3199-3205 DOI:10 1063 1 1725697
  • Periodic Table of Elements: Los Alamos National Laboratory
    Promethium shows promise as a portable X-ray source, and it may become useful as a heat source to provide auxiliary power for space probes and satellites More than 30 promethium compounds have been prepared Most are colored
  • Promethium: A Comprehensive Guide to Its Properties, Uses, and Safety
    Explore the fascinating world of Promethium, a rare and radioactive lanthanide Learn about its unique properties, industrial uses like luminous paints and atomic batteries, its potential medical applications, and the safety precautions required





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