Currently, none of the period 8 elements have been discovered yet, and it is also possible, due to drip instabilities, that only the lower period 8 elements, up to around element 128, are physically possible.
Saat ini, tidak ada satupun unsur periode 8 yang ditemukan, dan juga mungkin, karena ketidakstabilan tetesan nuklir, bahwa hanya unsur di bawah periode 8, sampai sekitar unsur 128, yang secara fisika mungkin dilakukan.