
Learning Objectives *Atomic Number Of Carbon 12 *What Is The Atomic Number Of Cr *Cr Mass Number *Atomic Number Of Carbon Element *Chromium Symbol *Atomic Mass Of Cr Cr I Ground State 1s 2 2s 2 2p 6 3s 2 3p 6 3d 5 4s 7 S 3 Ionization energy 54575.6 cm