Actinide

The atomic bomb dropped on Nagasaki had a plutonium charge.[1]

Enrico Fermi suggested the existence of transuranium elements in 1934.

Glenn T. Seaborg and his group at the University of California at Berkeley synthesized Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No and element 106, which was later named seaborgium in his honor while he was still living. They also synthesized more than 100 atomic actinide isotopes.

Actinides have 89 to 103 protons and usually have 117 to 159 neutrons.

The actinide /ˈæktᵻnaɪd/ or actinoid /ˈæktᵻnɔɪd/ (IUPAC nomenclature) series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium.

The actinide series derives its name from the first element in the series, actinium. The informal chemical symbol An is used in general discussions of actinide chemistry to refer to any actinide. All but one of the actinides are f-block elements, corresponding to the filling of the 5f electron shell; lawrencium, a d-block element, is also generally considered an actinide. In comparison with the lanthanides, also mostly f-block elements, the actinides show much more variable valence. They all have very large atomic and ionic radii and exhibit an unusually large range of physical properties. While actinium and the late actinides (from americium onwards) behave similarly to the lanthanides, the elements thorium through neptunium are much more similar to transition metals in their chemistry.

单词	actinoid
释义	actinoid /'æktɪnɒɪd//'æktənɔɪd/ 英汉-汉英词典 adj. 放射线状的词组 \| 习惯用语您要查找的是不是： action n. 行动；活动；功能；情节；战斗 actinic adj. 化学线作用的；化学线的 actinide n. [化]锕类；[化]锕系元素 actinium n. 锕（元素符号Ac）网络短语: actinoid nuclei 锕系元素核 actinoid contraction 锕系元素收缩 Actinoid elements 放射化学 actinoid d 放射线状的 Actinoid traffic lines 放射形交通线 areola actinoid incision 乳晕放射状切开 actinoid d contraction 锕系元素收缩 Actinoid series elements 锕系元素 Actinoid private line 放射形专用线英语例句库 This review summaries the application of ion exchangers in the separation and determination of alkali metals, alkali-earth metals, noble metals, rare earth elements and actinoid. 离子交换剂在萃取色谱中得到了广泛的应用，本文详细总结了离子交换剂在分析化学中用于碱金属、碱土金属、贵金属、稀土元素、锕系元素等的分离与测定。 The problem of collecting and delivery shunting of non-through wagon flow on the actinoid private line belongs to a kind of the combinatorial optimization problems. 放射形专用线非直达车流取送车问题属于一类组合优化问题,影响因素较多。声明：以上例句、词性分类均由互联网资源自动生成，未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。英语百科 Actinide The actinide /ˈæktᵻnaɪd/ or actinoid /ˈæktᵻnɔɪd/ (IUPAC nomenclature) series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium. The actinide series derives its name from the first element in the series, actinium. The informal chemical symbol An is used in general discussions of actinide chemistry to refer to any actinide. All but one of the actinides are f-block elements, corresponding to the filling of the 5f electron shell; lawrencium, a d-block element, is also generally considered an actinide. In comparison with the lanthanides, also mostly f-block elements, the actinides show much more variable valence. They all have very large atomic and ionic radii and exhibit an unusually large range of physical properties. While actinium and the late actinides (from americium onwards) behave similarly to the lanthanides, the elements thorium through neptunium are much more similar to transition metals in their chemistry. 近义、反义、联想词近义词 n. group, grouping adj. actinomorphic, actinomorphous 反义词 n. zygomorphic, bilaterally symmetrical, zygomorphous 英英词典 actinoid n. any of a series of radioactive elements with atomic numbers 89 through 103 synonymous： actinide, actinon actinoid adj. having a radial form starfish are actinoid--that is, they are radially symmetrical
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actinoid /'æktɪnɒɪd//'æktənɔɪd/

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网络短语:

Actinide

近义词

反义词