Question

Difference between angular momentum of electron and orbital angular momentum in chemistry

Answer 1

Angular momentum is defined as the product of moment of inertia and angular velocity of a body.

A body of mass ‘m’ revolving in a circular path of radius ‘r’ with angular velocity ‘ω’ will have an angular momentum as,

L = m (r × ω) [bold letters indicate vector quantities]

The SI unit of angular momentum is kg m2/s

Linear momentum is defined as the product of mass and linear velocity of a body.

A body of mass ‘m’ moving with velocity ‘v’ has a linear momentum of,

P = mv [bold letters indicate vector quantities]

The SI unit of linear momentum is kg m/s.

Answer 2

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angular momentum: a vector quantity that is a measure of the rotational momentum of a rotating body or system, that is equal in classical physics to the product of the angular velocity of the body or system and its moment of inertia with respect to the rotation axis, and that is directed along the rotation axis.

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Orbital angular momentum:
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The component of angular momentum of an electron in an atom or a nucleon in a nucleus, arising from its orbital motionrather than from its spin.

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