There were seven elements (with Z < 92) which were not found and therefore identified as still undiscovered, corresponding to atomic numbers 43, 61, 72, 75, 85, 87 and 91.
Ada tujuh elemen (dengan Z < 92) yang tidak ditemukan dan karenanya diidentifikasi masih belum ditemukan, sesuai dengan nomor atom 43, 61, 72, 75, 85, 87 dan 91.