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理学
放射性元素
释
radium
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天然放射性元素,元素符号Ra,原子序数88,半衰期最长的同位素的质量数226,属周期系ⅡA族,碱土金属元素。英文名来源于拉丁文radius(射线)。
Astronomy
全称:radium。缩写:Ra
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Chemistry
>放射化学与辐射化学>放射性元素化学>释义
radium
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shear-flocculation flotation
shear flow
shear flow field induced self-assembly
shear folding
shear fracture
shear-free
sheargraph
shear-induced structure
shearing
shearing effect
shearing field
shearing interferometer
shearing interferometer wavefront sensor
shearing machine
shearing mark
shearing plane
shearing strain
shearing stress
shear instability
shear lag
shear layer
shearlet transform
shear line
shear matrix
shear mode
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