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物质的原子理论
The earliest recorded discussion of the basic structure of matter comes from ancient Greek philosophers. Leucippus and Democritus argued that all…
亚原子粒子
Dalton was only partially correct about the particles that make up matter. All matter is composed of atoms, and atoms are composed of three smaller…
元素:化学符号和同位素
A chemical symbol is an abbreviation used to indicate an element or an atom of an element. For example, the symbol for mercury is Hg. The same symbol…
离子和离子电荷
In ordinary chemical reactions, the nucleus — which contains the protons and neutrons of each atom and thus identifies the element —…
元素周期表
As early chemists discovered more elements, they realized that various elements could be grouped by their similar chemical behaviors. One such…
原子质量
Atoms — and the protons, neutrons, and electrons that compose them — are extremely small. For example, a carbon atom weighs less than 2…
摩尔质量
The identity of a substance is defined not only by the types of atoms or ions it contains but by the quantity of each type of atom or ion. For…
Ppq 级实验室系统中的自动<sup>90</sup>Sr 分离和预富集
A quick, automated and portable system for the separation and determination of radiostrontium in aqueous samples, using Sr-resin and multi sequential…
用于测定金属结合寡聚肽的金属电子识别和机制的Ion流动性-质谱技术
Electrospray ionization (ESI) can transfer an aqueous-phase peptide or peptide complex to the gas-phase while conserving its mass, overall charge,…
<sup>为229m</sup>Th的研究准备一个同位素<sup>纯229</sup>Th Ion光束
A methodology is described to generate an isotopically pure 229Th ion beam in the 2+ and 3+ charge states. This ion beam enables one to investigate…

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