Pentoctseptium (Pos)
Pentoctseptium is the systematic name of the theoretical ٥٨٧. element in the periodic table with a symbol of Pos and atomic number of 587. Pentoctseptium, also known as element 587, has خمسة مائة وسبعة وثمانون protons in its nucleus, and خمسة مائة وسبعة وثمانون electrons in its shells.