chemical element

chemical element

化学元素

例句与用法：

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

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