Introduction of new science book / NI Concepts

NI CONCEPTS!! Chemistry/Science -BI Topic : Percentage of Different Gases in Atmosphere This lecture is specially recorded for students of 9th class, 9th class from all Punjab Boards and is based on the current curriculum of study for Chemistry book. HINDI / URDU ---------------------------------------------------------------------------------------------------------- THANKS FOR WATCHING! DON'T FORGET TO LIKE AND SUBSCRIBE! Note: If you have any question, let me know in the comment section below!! ----------------------------------------------------------------------------------------------------------- Tags used.. 9th class chemistry ninth bise lahore board examination structure of molecules why do atoms react chemically why do atoms combine to form bond chemical bond water oxygen solid liquid gas stable noble gases argon krypton and neon NaCl sodium chloride table salt formation of NaCl or table salt carbon hydrogen duplet rule octet rule electron neutrons protons ionic bond covalent bond coordinate covalent bond types of bonds ionic bond how ionic bonds are formed periodic table ionic bond between nacl ptb punjab text book covalent bond co valent short explanation online lecture scheme live lecture representation of covalent bond how covalent bond is formed between Hydrogen and chlorine between two hydrogen atoms electronic configuration of sodium chloride how to learn periodic table elements on finger tips easiest way to learn or remember periodic table elements shortest way short form of elements groups in periodic table valency a and b sub groups what are full explanation types of covalent bond single covalent bond double covalent bond triple covalent bond with examples bond pairs and lone pairs fully explained bonding electrons online lecture basic chemistry 10th class atomic number mass number explanation human skeleton structure of skeleton structure of living organism axial skeleton and appendicular skeleton difference between axial and appendicular skeleton