Protons and ____ are found in the nucleus. ____ are on the energy shells. Protons and neutrons have a mass of ____. Electrons have a mass of almost ____. Protons have a ____ charge. Electrons have a ____ charge. ____ have no charge.

Atom structure

打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？