日常生活中的科学
Why do metals conduct electricity?
Sodium has 11 electrons; its outer 3s electron helps explain why sodium readily forms Na+.
→
简短答案
Sodium has 11 electrons; its outer 3s electron helps explain why sodium readily forms Na+.
真正发生了什么？
Table salt is not made of isolated NaCl molecules in the solid; it forms an extended ionic lattice.
一个有用的直观图景
→
In a metal, some electrons are not confined to one bond between two atoms. Their collective electronic structure lets charge respond to an electric field.