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：


请选择你想看的字典辞典：
单词字典翻译
170980查看　170980　在百度字典中的解释百度英翻中〔查看〕
170980查看　170980　在Google字典中的解释Google英翻中〔查看〕
170980查看　170980　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:


  • Lanthanum - Wikipedia
    Lanthanum is a chemical element; it has symbol La and atomic number 57 It is a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum is the first and the prototype
  • Lanthanum - Element information, properties and uses | Periodic Table
    Element Lanthanum (La), Group 19, Atomic Number 57, d-block, Mass 138 905 Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images
  • Rare Earth Element, Uses in Technology, Medicine - Britannica
    Two isotopes occur in nature: stable lanthanum-139 (99 9119 percent) and very long-lived radioactive lanthanum-138 (0 0888 percent) A total of 38 radioactive isotopes of lanthanum (excluding nuclear isomers) have been characterized, ranging in mass from 117 to 155 and in half-life from 23 5 milliseconds (lanthanum-117) to 1 02 × 10 11 years (lanthanum-138)
  • Lanthanum Facts - Atomic Number 57 or Symbol La - Science Notes and . . .
    Periodic Table Placement and Element Group Lanthanum is located in Group 3 and Period 6 of the periodic table Based on its electron configuration of [Xe] 5d¹ 6s², it belongs to the d-block But, the energies of the 5d and 4f orbitals overlap and the 4f shell participates in chemical reactions and chemical bond formation
  • Lanthanum (La) Element: Properties, Uses, Reactions, Effects - Science Info
    Lanthanum is a chemical element with the atomic number 57 and is represented by the symbol ‘La’ in the periodic table It is soft and silvery in appearance and classified as rare earth metal and belongs to the d-block of the lanthanide group of the periodic table
  • Lanthanum | La (Element) - PubChem
    The name derives from the Greek lanthanein for "to be hidden" or "to escape notice" because it hid in cerium ore and was difficult to separate from that rare earth mineral Lanthanum was discovered by the Swedish surgeon and chemist Carl-Gustav Mosander in 1839 In 1842, Mosander separated his lanthanium sample into two oxides; for one of these he retained the name lanthanum and for the other
  • WebElements Periodic Table » Lanthanum » the essentials
    Lanthanum atoms have 57 electrons and the shell structure is 2 8 18 18 9 2 The ground state electronic configuration of neutral lanthanum is [Xe] 5d 1 6s 2 and the term symbol of lanthanum is 2 D 3 2 Lanthanum: description Your user agent does not support the HTML5 Audio element
  • Lanthanum (La) - Periodic Table
    Lanthanum is the 57th element in the periodic table and has a symbol of La and atomic number of 57 It has an atomic weight of 138 90547 and a mass number of 139
  • Lanthanum (La) - Definition, Preparation, Properties, Uses . . . - Examples
    Chemical Properties of Lanthanum Lanthanum exhibits several chemical properties that are notable: Oxidation States: The most common oxidation state of Lanthanum is +3, which is a characteristic it shares with other lanthanides This oxidation state is due to the loss of three electrons, resulting in a stable electronic arrangement
  • List of elements by symbol - Simple English Wikipedia, the free . . .
    List of elements Atomic Number Name Symbol Group Period Number 1 Hydrogen H 1 1 2 Helium He 18 1 3 Lithium Li 1 2 4 Beryllium Be 2 2 5 Boron B





中文字典-英文字典  2005-2009