118 Unsur Kimia Lengkap: Contoh, Simbol, & Tabel Periodik

unsur 138Name of the isotope: Cesium-138; Cs-138 Symbol: 138 Cs or 138 55 Cs Mass number A: 138 (= number of nucleons) Atomic number Z: 55 (= number of protons) Neutrons N: 83 IsotopicThe sort of intruing element is Unsur 138, which can be sometimes called element 138. Even if this element does not even exist as the name indicated, its theoretical