What is the shape of an electron? If you recall pictures from your high school science books, the answer seems quite clear: an electron is a small ball of negative charge that is smaller than an atom.
Arvin Ash on MSN
Why is mercury a liquid?
This video explores the fascinating reasons behind the physical properties of elements. It answers questions about why ...
当前正在显示可能无法访问的结果。
隐藏无法访问的结果