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单词 Isotope abundance
释义

Isotope abundance

英语例句库

Uranium isotope abundance ratio has been measured by total sample evaporation and signal integration,and a thermal surface ionization mass sepctrometry equipped with multicollector has been used.

采用全蒸发技术、离子流强度积分的方式,用多接收器热表面电离质谱计测量铀同位素丰度。

中文百科

丰度 Natural abundance

(重定向自Isotope abundance)

同位素在自然界中的丰度,又称天然存在比,指的是该同位素在这种元素的所有天然同位素中所占的比例。丰度的大小一般以百分数表示。人造同位素的丰度为零。

周期表上所列的原子量实际上是各种同位素按丰度加权的平均值,这是因为各种同位素在自然界中往往分布的比较均匀,取平均值计算比较准确。

英语百科

Natural abundance 丰度

(重定向自Isotope abundance)

In physics, natural abundance (NA) refers to the abundance of isotopes of a chemical element as naturally found on a planet. The relative atomic mass (a weighted average, weighted by mole-fraction abundance figures) of these isotopes is the atomic weight listed for the element in the periodic table. The abundance of an isotope varies from planet to planet, and even from place to place on the Earth, but remains relatively constant in time (on a short-term scale).

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更新时间:2025/6/17 12:47:30