Septoctseptium (Sos)
Septoctseptium is the systematic name of the theoretical thứ 787 element in the periodic table with a symbol of Sos and atomic number of 787. Septoctseptium, also known as element 787, has bảy trăm tám mươi bảy protons in its nucleus, and bảy trăm tám mươi bảy electrons in its shells.