Surat Al-A’raf Ayat

unsur 138The 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 theoreticalThe following table shows the atomic nuclei that are isotonic (same neutron number N = 81) and isobaric (same nucleon number A = 138) with Lanthanum-138. Naturally occurring isotopes