元素 的中文句子和英文句子

这些是惰性元素。

These are inactive elements.


属，族元素周期表上的一栏

A column in the periodic table of the elements.


镭和铀是放射性元素.

Radium and uranium are radioactive elements.


放射性元素自然产生或人为制造的放射性元素

A naturally occurring or artificially produced radioactive element.


综合把分别的元素或物质连接成连贯的一个整体

The combining of separate elements or substances to form a coherent whole.


现在周期表包括人类已知的全部元素，这些元素按适当的顺序排列起来。

The periodic table now contains all the elements known to man arranged in their proper sequence.


惰性的与其它元素反应不活泼的；不能形成或很少能形成化合物的

Not readily reactive with other elements; forming few or no chemical compounds.


众所周知，当一种元素与氧结合时，形成的东西被称为氧化物。

It is well known that the thing formed when an element combines with oxygen is called oxide.


1810年以前还没有认出硫是一种元素。

Sulphur was not identified as an element until1810.


这两种元素已经化学合成.

The two elements are synthesized by a chemical process.