英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：

technetium    
n. 锝

□

technetium
n 1: a crystalline metallic element not found in nature; occurs
as one of the fission products of uranium [synonym:
{technetium}, {Tc}, {atomic number 43}]

technetium
Symbol: Tc
Atomic number: 43
Atomic weight: (98)
Radioactive metallic transition element. Can be detected in some stars
and
the fission products of uranium. First made by Perrier and Segre by
bombarding molybdenum with deutrons, giving them Tc-97. Tc-99 is the
most
stable isotope with a half-life of 2.6*10^6 years. Sixteen isotopes are
known. Organic technetium compounds are used in bone imaging. Chemical
properties are intermediate between rhenium and manganese.


请选择你想看的字典辞典：
单词字典翻译
technetium查看　technetium　在百度字典中的解释百度英翻中〔查看〕
technetium查看　technetium　在Google字典中的解释Google英翻中〔查看〕
technetium查看　technetium　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Technetium - Wikipedia
    Naturally occurring technetium is a spontaneous fission product in uranium ore and thorium ore (the most common source), or the product of neutron capture in molybdenum ores
  • Technetium | Radioactive, Synthetic, Transition Metal | Britannica
    Technetium, chemical element, synthetic radioactive metal of Group 7 (VIIb) of the periodic table, the first element to be artificially produced
  • Technetium | History, Uses, Facts, Physical Chemical Characteristics
    Technetium is an artificial element and was discovered in 1937 It is radioactive and have the greatest number of radioactive isotopes among the lightest elements of the periodic table
  • Technetium - Element information, properties and uses | Periodic Table
    Technetium was discovered by Emilio Segrè in 1937 in Italy He investigated molybdenum from California which had been exposed to high energy radiation and he found technetium to be present and separated it Today, this element is extracted from spent nuclear fuel rods in tonne quantities
  • Technetium Facts - Atomic Number 43 Element Symbol Tc
    Technetium is a transition metal element with atomic number 43 and element symbol Tc It is the lightest radioactive element Traces of technetium occur naturally, but it was discovered through synthesis in a lab and was the first artificial element
  • Technetium: A Comprehensive Guide to Its Properties, Uses, and Safety
    Discover the unique characteristics and applications of technetium, a transition metal with significant contributions to nuclear medicine and industry Learn about its history, physical and chemical properties, safety precautions, and much more
  • Technetium Facts, Symbol, Discovery, Properties, Uses
    A radioactive metal, technetium (pronounced as tek-NEE-she-em) is the first synthetically produced element Denoted by the chemical symbol Tc, it belongs to the family of transition metals [1]
  • Technetium | Tc (Element) - PubChem
    Chemical element, Technetium, information from authoritative sources Look up properties, history, uses, and more
  • Technetium - Living Periodic Table
    Technetium is a silvery-gray metal that doesn’t occur naturally in significant amounts on Earth In fact, almost all of the technetium we use today is made in nuclear reactors or particle accelerators It’s slightly radioactive and decays over time, which makes it useful in several key applications
  • Technetium Element Facts - chemicool. com
    Technetium is a rare, silver-gray metal that tarnishes slowly in moist air In powder form, it burns in oxygen to form the heptoxide (Tc 2 O 7) Technetium dissolves in nitric acid and concentrated sulfuric acid, but is not soluble in hydrochloric acid of any strength





中文字典-英文字典  2005-2009