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𬬭
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Encyclopedia
理学
放射性元素
释
roentgenium
𬬭
人工放射性元素,元素符号Rg,原子序数111,半衰期最长的同位素的质量数282。属周期系ⅠB族。为纪念德国物理学家W.K.伦琴[注]而命名。曾被称为111号元素(unununium),符号Uuu。
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normal continued fraction
normal contour
normal convergence
normal coordinate
normal coordinates
normal coordinate system
normal correction of magnetic field
normal correlation
normal count approach
normal covering
normal crossing
normal cross-section
normal current
normal curvature
normal curvature vector
normal curve
normal cycle
normal density function
normal derivative
normal determinant
normal developable surface
normal deviate
normal difference distribution
normal discrete group
normal dispersion
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