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roentgenium
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roentgenium
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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almost cyclic group
almost degenerate amplifier
almost direct product group
almost disjoint sets
almost equivalent
almost everywhere
almost everywhere continuous
almost everywhere convergence
almost everywhere convergent
almost everywhere divergence
almost everywhere divergent
almost flat manifold
almost G-invariant
almost Hamiltonian structure
almost homogeneous manifold
almost homogeneous space
almost impossible event
almost inner automorphism
almost integer
almost integral element
almost invariant
almost invariant element
almost invariant function
almost invariant set
almost isometric
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