L-0 Chemical Reactions & Equations | Ch-1 Class 10 Science | Symbols & Ionic Formulas| Tarif Bhayana

Before starting Class 10 Science Chapter 1 — Chemical Reactions and Equations — watch this prerequisite lecture covering element symbols, ionic charges (cations & anions), and how to write ionic formulas of compounds. A must-watch foundation lecture for CBSE 2025-26. ___________________________________________ ✅ WHAT YOU'LL LEARN IN THIS LECTURE: Symbols of important elements — H, He, Na, K, Fe, Cu, Ag, Au, Pb, Hg and more Positively charged ions (cations) — +1, +2, +3, +4 charge groups Cuprous vs cupric, ferrous vs ferric, mercurous vs mercuric, plumbous vs plumbic us = smaller charge, ic = larger charge (simple trick) Negatively charged ions (anions) — fluoride, chloride, oxide, sulphide and more Polyatomic ions — hydroxide, nitrate, sulphate, phosphate, carbonate, ammonium and more ate = 4 oxygens, ite = 3 oxygens (easy trick to remember) Steps to write ionic formula of any compound — cross multiplication method Examples: barium nitrate, copper sulphate, silver nitrate, lead phosphate ___________________________________________ 📚 This lecture is useful for all CBSE Class 10 Science students. All concepts are as per the NCERT Class 10 Science syllabus 2025-26. 👨‍🏫 ABOUT THE TEACHER: Tarif Sir covers Class 9 & 10 Science with a concept-first, exam-focused approach — completely free on YouTube. ⏱️ CHAPTERS: 0:00 Introduction & What is Lecture 0 0:44 Symbols of Important Elements 5:46 Positively Charged Ions — Cations (+1, +2, +3, +4) 12:06 Cuprous vs Cupric / Ferrous vs Ferric (us & ic trick) 15:15 Roman Numeral Representation of Charge 20:13 Negatively Charged Ions — Anions 21:37 Polyatomic Ions 23:32 ate vs ite trick (4 oxygens vs 3 oxygens) 27:20 Steps to Write Ionic Formula — Cross Multiplication 28:00 Example 1 — Barium Nitrate 33:43 Example 2 — Potassium Chloride 34:26 Example 3 — Copper Sulphate 35:49 Example 4 — Silver Nitrate 36:10 Example 5 — Lead Phosphate 💬 Got a doubt? Drop it in the comments — Tarif Sir answers personally. ___________________________________________ 📂 CLASS 10 SCIENCE COMPLETE PLAYLIST: ___________________________________________ This prerequisite lecture for Class 10 Science Chapter 1 covers everything you need before starting Chemical Reactions and Equations — including symbols of all important elements, ionic charges of cations and anions, polyatomic ions like sulphate, nitrate, hydroxide, phosphate and carbonate, and a step-by-step method to write ionic formulas using cross multiplication. All concepts are as per NCERT CBSE Class 10 Science syllabus 2025-26 class 10 science chapter 1 prerequisite lecture, element symbols class 10 science, ionic formula class 10, cations and anions class 10 science, ferrous ferric class 10, cuprous cupric class 10, polyatomic ions class 10, sulphate nitrate hydroxide formula class 10, how to write ionic formula class 10, chemical reactions equations class 10 NCERT, cross multiplication ionic formula class 10, class 10 science CBSE 2025-26, valency class 10 science, symbols of elements class 10, ionic compounds class 10, class 10 science in Hindi, NCERT class 10 science chapter 1, Tarif Bhayana class 10 science