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
C14查看　C14　在百度字典中的解释百度英翻中〔查看〕
C14查看　C14　在Google字典中的解释Google英翻中〔查看〕
C14查看　C14　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:


  • Carbon-14 - Wikipedia
    ^ Lowe D (1989) "Problems associated with the use of coal as a source of C14-free background material" Radiocarbon 31 (2): 117–120 Bibcode: 1989Radcb 31 117L doi: 10 1017 S0033822200044775 Archived from the original on 2013-07-24 ^ Jull AJ, Barker D, Donahue DJ (1985)
  • Carbon-14 | Dating, Mass, Half-life | Britannica
    Carbon-14, the longest-lived radioactive isotope of carbon, whose decay allows the accurate dating of archaeological artifacts from 500 to 50,000 years old Carbon-14 has a half-life of 5,730 years
  • Carbon-14 - isotopic data and properties - ChemLin
    Radioactive Decay Carbon-14 undergoes beta decay with emission of an electron and an electron antineutrino: 14 C → 14 N + e - + ve + 156 476 keV The decay product is the stable nuclide Nitrogen-14 Half-life T ½ = 5700 (30) a respectively 1 79874478055 × 1011 seconds s
  • Carbon 14 - an overview | ScienceDirect Topics
    Carbon-14 is a radioactive isotope of carbon, created in the atmosphere through the bombardment of nitrogen by cosmic rays, and is used in radiocarbon dating to determine the age of organic substances by measuring its decay over time AI generated definition based on: The Global Carbon Cycle and Climate Change (Second Edition), 2023
  • Carbon-14 - Production - Properties - Decay | nuclear-power. com
    Carbon-14 is a naturally occurring isotope Radioactive carbon-14 has a half-life of 5730 years and undergoes β− decay Carbon-14 is continuously formed in the upper atmosphere
  • C14 decays to N14 | The Structured Atom Model
    Normally Carbon has 12 Protons in its structure The C14 decays into Nitrogen 14 whereby a so called "extra neutron" changes into a proton and an electron that takes its place in the outer 'orbital'
  • Carbon-14 | CH4 | CID 26873 - PubChem
    Carbon-14, 14C, or radiocarbon, is a radioactive isotope of carbon with a nucleus containing 6 protons and 8 neutrons Its presence in organic materials is the basis of the radiocarbon dating method pioneered by Willard Libby and colleagues (1949) to date archaeological, geological and hydrogeological samples Carbon-14 was discovered on 27 February 1940, by Martin Kamen and Sam Ruben at the
  • SOP Carbon-14 - Columbia University
    INTRODUCTION: Carbon-14 is a commonly used radionuclide with a half-life of 5,730 years, emitting only beta particles with a maximum energy of 0 156 MeV (Million Electron Volts) and an average energy of 0 049 MeV The beta particles from C-14 travel a maximum of 22 cm
  • What is Carbon-14 (14C) Dating? Carbon Dating Definition - Radiocarbon
    Radiocarbon dating is a method that provides objective age estimates for carbon-based materials that originated from living organisms
  • C14 Dating Techniques - Coastal Systems Group
    C14 Dating Techniques What is 14C? Carbon is one of the elements which all living things are composed of The most common form of carbon is carbon-12 which has 6 protons and 6 neutrons 99 percent of all the carbon in the world is carbon-12 but some carbon atoms (isotopes) have additional…





中文字典-英文字典  2005-2009