宇宙間的物質,從它們的狀態上來區別,只有三種,即是固體、液體和氣體。從它們的性質上來區別,可以找到數十萬種。這數十萬種物質的性質,彼此都不一樣。而這些物質所包括的基本物質,我們叫它做元素。元素的種類一直到現在為止,被發現的只有九十八種,這九十八種元素在自然界中,因為溫度、壓力以及本身的性 The materials in the universe are distinguished from their state. There are only three types, namely, solids, liquids, and gases. Different from their nature, hundreds of thousands of species can be found. The properties of these hundreds of thousands of substances are different from each other. And the basic substances included in these substances are called elements. The types of elements that have been discovered so far are only 98. The 98 elements are in nature because of temperature, pressure, and