chemical element

名词 chemical element:

1. any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
   同义词：element

1. A form of matter hypothesized by proponents of the big bang theory to have existed before the formation of the chemical elements.
   原元素(依论)宇宙大爆炸理论中的假设存在于化学物质形成之前的物质形式
2. The tendency of chemical elements with similar positions in the periodic table to have similar properties.
   周期律化学元素在周期表中有相似位置时具有相似特性的趋势