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Encyclopedia
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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随便看
transverse mapping
transverse map projection
transverse mass
transverse Mercator projection
transverse mode
transverse mode, lateral mode
transverse mode selection principle
transverse modulation
transverse module
transverse momentum
transverse momentum distribution
transverse muscle
transverse optic phonon
transverse optic phonon, TO phonon
transverse parallax screw
transverse photon
transverse piezoelectric effect
transverse process
transverse projection
transverse propagation
transverse relaxation
transverse relaxation-optimized spectroscopy
transverse relaxation-optimized spectroscopy (TROSY)
transverse relaxation time
transverse resolution of ultrasound imaging
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