Chemistry Phosphorus Basics Cheat Sheet by 7kokcmax71 December 24, 2024 1. General Information Symbol: P Atomic Number: 15 Atomic Mass: 30.97 u Group: 15 (Pnictogens) Period: 3 Block: p-block Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p³ Valence Electrons: 5 Phase … Read more