Answer
Orbitals having the same energy are degenerate orbitals.
Work Step by Step
Orbital which have the same energy are degenerate orbitals. For example, the 3 s , 3 p , and 3 d orbitals all have the same energy— they are degenerate.
According to Hund’s rule, when filling degenerate orbitals, electrons fill them singly first, with parallel spins.
