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理学
放射性元素
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seaborgium
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人工放射性元素,元素符号Sg,原子序数106,半衰期最长的同位素的质量数271。属周期系ⅥB族。以著名化学家G.T.西博格[注]的名字而命名。
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negative semi-definite
negative semi-definite form
negative semi-definite kernel
negative semi definite matrix
negative semi-definite matrix
negative semi-definite operator
negative semi definite quadratic form
negative semi-definite quadratic form
negative semi-definte quadratic form
negative semi-orbit
negative semi-trough
negative sense single-stranded RNA virus
negative sequence
negative sequence current carrying capability
negative side
negative sign
negative skewness
negative skin friction of piles
negative spinor
negative stable matrix
negative staining
negative strand
negative stress
negative subspace
negative supercoiling
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