Proton - Positive Charge, Electron - Negative Charge, Neutron - No Charge/Neutral, Nucleus - Center of the atom, Electron Cloud - Energy levels that surround the nucleus, Matter - Anything that takes up space or has mass, Atom - Smallest particle into which an element can be divided into ,

排行榜

视觉风格

选项

切换模板

恢复自动保存: