Chemical element
01
化学元素, 単純物質
any of the simple chemical substances that consist of atoms of only one type, such as gold, oxygen, carbon, etc.
例
Hydrogen is the lightest chemical element and is found in many compounds.
水素は最も軽い化学元素で、多くの化合物に含まれています。
Helium is a noble gas chemical element with the atomic number 2.
ヘリウムは原子番号2の化学元素希ガスです。
