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protactinium

n. [化学] 镤（元素符号Pa，等于protoactinium）

1、[化学]镤

从辐照过的钍中分离镤的研究_stmopen 关键词】: 镤钍 PMBP TIOA [gap=926]Keywords Protactinium Thorium PMBP TIOA

2、琅

地质专业英语词汇P2 ...prostratigraphy 杩原始地层学protactinium 瑯镄protactinium 瑯 dating 镤年代测定法 ...

3、元素镤

哒酮 pa 专业辞典【化学】元素镤(protactinium)的符号pa【物理学】压强单位帕斯卡(pascal)的符号pa (pis passe-droit 音标：[pasdrwa]m.

protactinium pentachloride五氯化镤

Protactinium Compound镤化合物

protactinium dating镤年代测定法;镤测定年龄法

protactinium poisoning镤中毒

protactinium cas镤

Protactinium Isotope镤同位素

protactinium 233镤

pa protactinium镤

protactinium pentoxide五氧化镤

化学

地球科学

能源科学技术

生物学

n.a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead

同义词：protoactiniumPaatomic number 91

1.
N（名词） a toxic radioactive metallic element that occurs in uranium ores and is produced by neutron irradiation of thorium. Symbol: Pa; atomic no: 91; half-life of the most stable isotope, 231Pa: 32500 years; valency: 4 or 5; relative density: 15.37 (calc.); melting pt: 1572°C 镤 (Former name protoactinium)

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