Rutherfordium 鑪
（重定向自Unnilquadium）
Rutherfordium is a chemical element with symbol Rf and atomic number 104, named in honor of physicist Ernest Rutherford. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and radioactive; the most stable known isotope, Rf, has a half-life of approximately 1.3 hours.