Order of filling of orbitals (Aufbau)कक्षकों के भरने का क्रम (ऑफ़बाऊ)

NCERT Fig 2.17 · interactive diagram

Parts and their functions

• Follow the arrows top to bottom (तीरों के अनुसार ऊपर से नीचे) — Each arrow is one diagonal; follow arrows in order. This is the (n + l) rule: lower n + l fills first; if equal, lower n first (3d: 5 before 4p: 5).
• Resulting order (परिणामी क्रम) — 1s < 2s < 2p < 3s < 3p < 4s < 3d < 4p < 5s < 4d < 5p < 6s < 4f < 5d < 6p < 7s.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 2.17. Report a mistake