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A short - lived , radioactive synthetic transuranic element produced from californium and having

铹一种寿命期短的、人工合成的放射性超铀元素,从中生成,有质量从255到260的同位素,半衰期从几秒钟到三分钟;原子序数

Provide the world with only about 1 gram of californium.

最贵的金属——。1975年世界提供的仅约1克。1克的价格在10亿美元左右。

The Dubna laboratory is one of the few in the world able to handle radioactive heavy elements such as californium.

杜布纳的实验室是全世界少数几个能处理等放射性重元素的实验室之一。

The first samples were made through a nuclear reaction involving fusion of an isotope of californium, 249 Cf, with one of oxygen, 18 O.

第一样品透过核反应涉及融合的一个同位素,249酸钙,其中氧,18澳。

Plutonium was first discovered in a Berkeley lab (as were the aptly-named berkelium and californium).

加州大学伯克利分校的实验室第一次发现了钚元素(就像锫和被命名的那样)。

More recently, other isotopes have been made at the paul scherrer institute in switzerland using neon atoms to bombard californium isotopes.

最近,其他同位素已在保罗scherrer研究所(35/12)在瑞士用氖原子轰击的同位素。

To create a mere three atoms of element118, the scientists spent two months bombarding the californium target with30 billion billion calcium ions.

为了创造这微不足道的3个原子,科学家花费了2个月时间,用30万亿亿个钙离子来轰击离子。

The researchers fired a beam of calcium ions, each containing 20 protons, into a target of californium, a highly radioactive synthetic substance with 98 protons.

他们轰击了一束每个原子中含有20个质子的钙离子,得到了,一种原子核中含有98个质子的更高级人造放射性元素。

Element synthesized from californium.

一种放射性超铀元素,由合成。

推荐网络例句

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是,在否定句或疑问句里,这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷

Nusa lembongan : Bali's sister island, coral and sand beaches, crystal clear water, surfing.

Nusa Dua :豪华度假村,冲浪和潜水,沙滩,水晶般晶莹剔透的水,网络冲浪。