What is free electron and bound 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. David S.

What do you mean by bound electron?

A bound electron is one that is still considered part of the atom and is attracted to the nucleus whereas a free electron is one that absorbed enough energy from photons to completely leave the atom.

What are called free electrons?

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. An electric current is the flow of these free electrons in one direction.

What are free 10 electrons?

Solution: Electrons in the outermost shell of an atom, which can easily leave the atom and become free are called free electrons.

What is meant by free electron gas?

[′fer·mē ‚gas] (statistical mechanics) An assembly of independent particles that obey Fermi-Dirac statistics, and therefore obey the Pauli exclusion principle; this concept is used in the free-electron theory of metals and in one model of the behavior of the nucleons in a nucleus. Also known as Fermi-Dirac gas.

How do electrons become free?

The electrons which are not attached to the nucleus of a atom and free to move when external energy is applied are called free electrons. When small amount of external energy in form of heat or light is applied to the valence electrons then they get pulled away from the parent atom and becomes free. …

What is the difference between free electron and valence electron?

Valence electrons are electrons that are loosely bound to an atom. Free electrons are completely unbound to any atom. Valence electrons are responsible for the chemical reactions and chemical bonding of atoms.

What is free electron class 9th?

Electrons in the outermost shell of an atom, which can easily leave the atom and become free are called free electrons.

What is meant by classical free electron theory?

A classical free electron theory is a macroscopic theory proposed by Paul Drude in 1900. After the discovery of electron by JJ Thomson, this theory was elaborated by Lorentz in 1909. According to this theory, the free electrons move with a constant potential obeys quantum laws (Fermi-Dirac statistics).

Which one is correct about free electron theory?

Explanation: The free electrons move randomly in all directions. The free electrons collide with each other and also with the lattice Elastically, without loss in energy.