• 系:周期表原子序数57~71)15种按顺序排列化学元素系列

    Lanthanide: Any of the series of 15 consecutive chemical elements in the periodic table from lanthanum to lutetium (atomic numbers 57-71).

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  • 结论能谱ct测定结石平均有效原子序数可以较准确判定结石化学成分

    Conclusion the effective average atomic number of energy spectrum ct can precisely determine the chemical composition of calculus.

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  • 它们相同原子序数因此化学行为几乎完全一样原子不同

    They have the same atomic number and hence nearly identical chemical behaviour but different atomic masses.

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  • 非金属化学元素化学符号P原子序数15

    Phosphorus Nonmetallic chemical element, chemical symbol P, atomic number 15.

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  • 半金属化学元素化学符号B原子序数5

    Boron: Semimetallic chemical element, chemical symbol b, atomic number 5.

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  • 原子序数18原子39。948,一种稀有气体。1894年英国化学瑞利拉姆赛发现

    Atomic number 18, atomic weight 39. 948, is a rare gas. 1894 by the British chemist Rayleigh and Ramsay found.

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  • 特性相似一组化学上有联系元素原子序数5771;稀土元素。

    The set of chemically related elements with properties similar to those of lanthanum, with atomic Numbers from 57 to 71; the rare-earth elements.

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  • 非金属化学元素化学符号I原子序数53

    Iodine: Nonmetallic chemical element, chemical symbol I, atomic number 53.

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  • 碱金属化学元素化学符号k原子序数19

    Potassium: chemical element, one of the alkali metals, chemical symbol k, atomic number 19.

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  • 周期表中铀以后任何化学元素(原子序数大于92)。

    Transuranium element Any of the chemical elements after uranium in the periodic table (with atomic Numbers greater than 92).

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  • 气态化学元素化学符号N原子序数7

    Nitrogen: Gaseous chemical element, chemical symbol n, atomic number 7.

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  • 一种轻化学元素化学符号H原子序数1

    Hydrogen: Lightest chemical element, chemical symbol h, atomic number 1.

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  • 金属化学元素,为过渡元素一种化学符号Fe原子序数26

    Iron: Metallic chemical element, one of the transition elements, chemical symbol Fe, atomic number 26.

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  • 化学元素化学符号Rn原子序数86。

    Radon: Chemical element, chemical symbol Rn, atomic number 86.

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  • 半金属化学元素化学符号se原子序数34

    Selenium: Semimetallic chemical element, chemical symbol Se, atomic number 34.

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  • 碱土金属中最轻化学元素化学符号Be,原子序数4

    Beryllium: chemical element, lightest of the alkaline earth metals, chemical symbol be, atomic number 4.

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  • 金属化学元素,为过渡元素一种化学符号Ir原子序数77。

    Iridium: Metallic chemical element, one of the transition elements, chemical symbol Ir, atomic number 77.

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  • 金属化学元素过渡元素之一化学符号Ag原子序数47

    Silver: Metallic chemical element, one of the transition elements, chemical symbol Ag, atomic number 47.

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  • 化学元素化学符号,Xe原子序数54

    Xenon chemical element, chemical symbol Xe, atomic number 54.

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  • 非金属化学元素化学符号Br原子序数为35

    Bromine Nonmetallic chemical element, chemical symbol Br, atomic number 35.

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  • 化学元素,周期表iii b族过渡金属丰度最大稀土金属。化学符号Ce原子序数58

    Cerium: chemical element, a rare earth metal of the lanthanide series (hence having many properties of the transition elements), chemical symbol ce, atomic number 58.

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  • :周期表VIb族金属化学元素,是过渡元素元素之一化学符号Cr原子序数24

    Chromium: Metallic chemical element, one of the transition elements, chemical symbol Cr, atomic number 24.

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  • 亦称水银):金属化学元素化学符号Hg原子序数80。

    Mercury (quicksilver): Metallic chemical element, chemical symbol Hg, atomic number 80.

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  • 亦称水银):金属化学元素化学符号Hg原子序数80。

    Mercury (quicksilver): Metallic chemical element, chemical symbol Hg, atomic number 80.

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