What is the free electron in solid state physics?

free-electron model of metals, in solid-state physics, representation of a metallic solid as a container filled with a gas composed of free electrons (i.e., those responsible for high electrical and thermal conductivity).

What is the free electron in solid state physics?

free-electron model of metals, in solid-state physics, representation of a metallic solid as a container filled with a gas composed of free electrons (i.e., those responsible for high electrical and thermal conductivity).

What is free electron model theory?

The free electron model considers that metals are composed of a quantum electron gas where ions play almost no role. The model can be very predictive when applied to alkali and noble metals.

What is free electron theory of metals?

The treatment of a metal as containing a gas of electrons completely free to move within it. The theory was originally proposed in 1900 to describe and correlate the electrical and thermal properties of metals.

What is free electron with example?

Metals atoms have loose electrons in the outer shells, which form a ‘sea’ of delocalised or free negative charge around the close-packed positive ions. These loose electrons are called free electrons. They can move freely throughout the metallic structure.

What is free electron model discuss the merits and demerits of free electron model?

What are the merits and demerits of classical free electron theory? 1) It verifies ohm’s law. 2) It explains electrical and thermal conductivities of metals. 3) It derives Widemann-Franz law.

How free electrons are formed?

Most free electrons are formed with low kinetic energy, and they simply diffuse through the gas, taking part in the random thermal motion of all the atoms. Some free electrons are formed with enough kinetic energy to cause additional excitation and ionization.

What are the limitations of free electron model?

Drawbacks of classical free electron theory 1) It fails to explain the electric specific heat and the specific heat capacity of metals. 2) It fails to explain superconducting properties of metals. 3) It fails to explain new phenomena like photo-electric effect, Compton effect, Black body radiation, etc.

How are free electrons created?

Why are free electrons called so?

These free electrons are named so because they move around freely without being attached to the nucleus. These electrons do not experience any electromagnetic force.

Which properties of solids are explained successfully by the free electron model?

1) It verifies ohm’s law. 2) It explains electrical and thermal conductivities of metals. 3) It derives Widemann-Franz law. 4) It explains optical properties of metals.

What is the difference between electron and free electron?

A free electron is one that is not bound to an atom, whereas a bound electron is one that is bound to the nucleus of atom. An important distinction is that free electrons are not apart of the quantum system, whereas bound electrons are.

What are the salient features of free electron theory?

This theory has some assumptions; they are: The valence electrons of metallic atoms are free to move in the spaces between ions from one place to another place within the metallic specimen similar to gaseous molecules so that these electrons are called free electron gas.