What is the angular momentum of an electron in (i) 2 s orbital (ii) 4f orbital ?

Explanation

Angular momentum of electron in any orbital `= sqrt(l(l + 1)) = (h)/(2pi)`
`:.` For 2 s orbital, `l = 0, " " :.` angular momentum `= sqrt(0(0 + 1)) (h)/(2pi) = 0`
For 4f orbital, `l = 3, " " :.` angular momentum `= sqrt(3(3 +1)) (h)/(2pi) = 2 sqrt3 (h)/(2pi) = sqrt3 (h)/(pi)`