Rutherfordium (Rf), element 104 – Learn Acer periodic table

Rutherfordium

Transition metal, atomic number 104.

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, 267Rf, has a half-life of approximately 1.3 hours. In the periodic table of the elements, it is a d - block element and the second of the fourth - row transition elements.

Facts

Symbol Rf. Atomic mass 267.0 u. Group 4, period 7. Electron configuration [Rn] 5f14 6d2 7s2. Electrons per shell 2, 8, 18, 32, 32, 10, 2. State at room temperature: Solid. Melting point 2126.8 °C, boiling point 5526.9 °C. Discovered by Joint Institute for Nuclear Research.

Element data from Wikipedia, CC BY-SA 3.0.