atom - a single particle of an element, element - made up of only one type of atom, compound - made of two or more atoms bonded together. the atoms can be the same or different, mixture - made up of two or more different types of atom not chemically bonded together, molecule - made up of two or more different elements chemically bonded together,

atoms, elements, compounds

列印
嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?