Penthexunium (Phu)

Penthexunium is the systematic name of the theoretical ที่ 561 element in the periodic table with a symbol of Phu and atomic number of 561. Penthexunium, also known as element 561, has ห้า​ร้อย​หก​สิบ​เอ็ด protons in its nucleus, and ห้า​ร้อย​หก​สิบ​เอ็ด electrons in its shells.