Which orbital is lower in energy

[alijan kk]

Molecular orbital
Atomic orbital
Ionic orbital

I have learned molecular orbital theory, and it says antibonding orbital is of higher energy than bonding orbital.

what are molecular and atomic orbitals?

 

[DrClaude]

Your question is too broad to be answered in a thread. You'll have to do some reading first.

Grap a good book on atomic and molecular physics or quantum chemistry. There are also some web resources which can be helpful, such as
https://chem.libretexts.org/Textboo..._and_Bonding/1.02:_Atomic_Structure:_Orbitals
https://chem.libretexts.org/Textboo...Theory/Electrons_in_Atoms/Electronic_Orbitals
https://chem.libretexts.org/Textboo...ular_Structure/9.08:_Molecular_Orbital_Theory