PPT - Unsur 138 PowerPoint Presentation, free download

unsur 138Recently, 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 likeName 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 Isotopic