Class 9 Chemistry 3.3 | Electronic Configuration (Shells, Subshells, Aufbau, Hund) | FBISE Urdu

🧪 Class 9 Chemistry — Topic 3.3: Electronic Configuration (Shells aur Subshells) (FBISE / asaan Urdu) Is video mein seekhein: shells K, L, M, N aur 2n² ka qaida; subshells s, p, d, f (2, 6, 10, 14); Aufbau principle aur tarteeb 1s 2s 2p 3s 3p 4s 3d 4p; Hund's rule (bus ki seats); Na, Cl, K, Ca aur Fe ki configuration (4s pehle, 3d baad mein); valence electrons; code se bane aur check kiye gaye shell diagrams; aam ghaltiyan, Video rok kar socho checks aur flashcards. 📝 FBISE asli sawal: SSC-I Chemistry 2024 Annual, Section B Q2(iii): Write electronic configuration of the following elements: (a) ³⁵₁₇Cl (b) ²³₁₁Na (c) ²⁰₁₀Ne (3 marks). Practice: SSC-I Chemistry 2024 Annual (Science, Group D paper), Section B Q2(iii): Write electronic configuration of the following elements: (a) ¹⁴₆C (b) ⁴⁰₁₈Ar (c) ⁴⁰₂₀Ca. ⏱️ Chapters 0:00 Hook 0:37 Learning Goals 0:59 Shells aur 2n² 1:31 Subshells s, p, d, f 2:42 Aufbau aur Hund's Rule 4:25 Configuration Likhna 6:11 Valence Electrons 7:09 Aam Ghaltiyan 7:29 Recap 7:52 Flashcards 9:14 CTA 📚 AI Assisted Study Guide — FBISE Class 9 (Rs 1,000 per student pack) 🌐 https://ai4kids.courses 📲 WhatsApp: 0337 1468899 — likhein CLASS 9 👍 Video pasand aaye to Like karein, Subscribe karein aur doston ke saath share karein! #Class9Chemistry #ElectronicConfiguration #AufbauPrinciple #HundsRule #ValenceElectrons