Unoctseptium is the systematic name of the theoretical ที่ 187 element in the periodic table with a symbol of Uos and atomic number of 187. Unoctseptium, also known as element 187, has หนึ่งร้อยแปดสิบเจ็ด protons in its nucleus, and หนึ่งร้อยแปดสิบเจ็ด electrons in its shells.