Скачать или смотреть 3D Video: The Free Electron - The Electron Sea - The Conductor - The Atom & Valence Shell

3D Video: The Free Electron - The Electron Sea - The Conductor - The Atom & Valence Shell

Segment 1. The Atom & Valence Shell
Introduction and the origin of free electrons.
"Every atom has electrons orbiting its nucleus. The outermost ones are called valence electrons."

Segment 2. Becoming 'Free'
How an electron breaks its bond in a metal?
"In metals, these valence electrons are so weakly bound they break free from their parent atom and begin to wander. They are now free electrons."

Segment 3. The Electron Sea
Describing the free electron "gas."
"The collective of these free electrons is often described as an electron gas or electron sea—a cloud of negative charge moving randomly through the positive ion cores."

Segment 4. The Conductor
The role of free electrons in electric current.
"When we apply an electric field, this random motion becomes an organized drift. The free electrons are all pulled in one direction, creating an electric current."

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