Which of the following are correct ?

Options

A. All s-orbitals have the same orbital angular momentum.
B. The angular momentum of the electron in `4^(th)` orbit is `2h//pi`
C. The magnetic moment of `Cu^(2+)` ion = 1.732 B.M.
D. All d-orbitals have two nodal planes.

Answer

A, B, C

Explanation

a) is correct because orbital angular momentum `sqrt(1(1+1)) h/(2pi)` .
b) is correct angular momentum in `4^(th)` orbit `=(nh)/(2pi) = (4xx h)/(2pi) = (2h)/(pi)`
c) is correct because `Cu^(2+)` has one unpaired electron and
`mu =sqrt(n(n+2)) = sqrt(3) = 1.732 B.M`
d) is wrong because `d_z^2` orbital has no nodal plane.