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Just as linear momentum is the product of mass(m) and linear velocity (v), angular momentum is the product of moment of inertia(I) and angular velocity().For an electron of mass me, moving in a circular path of radius r around the nucleus.

Angular momentum = I × ω

Since I = mer2, and ω = v/r; v is the linear velocity, angular momentum = mer2 × (v/r) = mevr

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