Question

how many nodes are in 3- d orbital​

Answer 1

Answer:

In general, the nd orbital has (n - 3) radial nodes, so the 3d-orbitals have (3 - 3) = 0 radial nodes, as shown in the above plot. Radial nodes do become evident, however, in the higher d-orbitals (4d, 5d, and 6d).

Answer 2

An orbital is the spatial component of one-electron wavefunctions of the atom. There are points in space where the wavefunction is 0. This corresponds to a zero probability of the electron existing there and no part of the orbital resides there. Such areas where there is zero probability of the electron being found are termed nodes.