Microsoft Word1. 2973-Puji Lestari (128-138).doc

unsur 138Namun, setelah unsur 120, pengisian konfurasi elektronik berhenti mematuhi prinsip Auau. Menurut prinsipnya, unpenttrium harus memiliki konfurasi elektronik [Og]8s 2 5g 18 6f 14 7dRecently, Unsur 138 is known as a placeholder name for a element which could founder the extended periodic table. The atomic number 138 shows that it can act like