Chem Mantra
HomeCoursesOnline TestsForum
ForumQuestion BankThe correct order of increasing energy of orbit…
MEDIUMMCQ SINGLEJEE Advanced ChemistryPhysical ChemistryAtomic StructureIntro

The correct order of increasing energy of orbitals in hydrogen atom is

0.1s < 2s < 2p < 3s < 3p < 3d < 4s < 4p < 4d < 4f
1.1s < 2s < 2p < 3s < 3p < 3d < 4s < 4p < 4d < 4f (same energy for same n)
2.1s < 2s = 2p < 3s = 3p = 3d < 4s = 4p = 4d = 4f
3.1s < 2s < 3s < 4s < 2p < 3p < 4p < 3d < 4d < 4f
Explanation

In a hydrogen atom (one-electron system), energy depends only on the principal quantum number n. All orbitals with the same n are degenerate: 2s = 2p; 3s = 3p = 3d; 4s = 4p = 4d = 4f.

Back to Question Bank

Practice More Like This

Take chapter-wise tests, track your progress, and master Atomic Structure.

Start Free Practice →
Sponsored

Master Chemistry for JEE, NEET & IChO

Access 19,000+ solved questions with expert explanations, chapter-wise tests, and full video lectures — all in one platform.

JEE Advanced Chemistry
Explore Courses →Sign In Free