n.镎(放射性化学元素)

Neptunium is a transuranic element with the atomic number 93.
钚是一种超铀元素，原子序数为93。
The radioisotope neptunium-237 is used in some types of nuclear reactors as a source of heat.
镎-237这种放射性同位素在某些类型的核反应堆中用作热源。
The discovery of neptunium in 1940 marked the beginning of the transuranic series of elements.
1940年发现的钚标志着超铀元素系列的开始。
Neptunium has no stable isotopes and all its isotopes are radioactive.
钚没有任何稳定的同位素，其所有同位素都是放射性的。
Neptunium metal is silvery-white in color and it reacts readily with air, water, and most acids.
钚金属呈银白色，容易与空气、水和大多数酸发生反应。
In nuclear weapons, neptunium can be used as a component of a mixed oxide fuel or as a breedable material for plutonium production.
在核武器中，钚可以作为混合氧化物燃料的一个组成部分，或者用于生产钚的可增殖材料。
The long-lived isotope neptunium-237 can pose significant environmental and health risks due to its toxicity and radioactivity.
半衰期较长的钚-237因其毒性及放射性可能对环境和人体健康构成重大风险。
A small amount of neptunium can be produced as a byproduct during the reprocessing of spent nuclear fuel.
在处理使用过的核燃料过程中会产生少量的钚。
The chemical behavior of neptunium resembles that of uranium but is more complex due to the presence of multiple oxidation states.
钚的化学性质类似于铀，但由于存在多种氧化态而更为复杂。
Research on neptunium's biological effects is limited because of its high radioactivity and difficulty in handling safely.
由于钚具有高放射性和难以安全处理的特点，对其生物学效应的研究相对有限。