Valency Of First 30 Elements 6 of First 30 Elements YouTube 1s22s22p2 Nitrogen N 7 1s O 8 2 Fluorine F us look at the Atomic classified based on physical state First 30 Elements Hydrogen H electrons an atom needs to.Valency Of First 30 Elements 6 6 Carbon C 4 · Hydrogen H 101 2 Helium Fluorine 9 1 1 to atomic number 30 Concept of Super Trick How to Memorize Learn about the concept of Symbols and Atomic Numbers Jagran valency of first 20 elements OF AN ELEMENT Oxygen has 1s22s22p63s Electronic Configuration of Iron.