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Rutherfordium (Rf)
Atomic number: 104 · Category: transition metal · Group 4 · Period 7 · Phase: Solid
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.
Block: d
CPK color:#cc0059
Electronic structure
Electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d2
Configuration (semantic): [Rn] 5f14 6d2 7s2
Shells: 2, 8, 18, 32, 32, 10, 2
Ionization energies: 580
Periodic position
Group: 4
Period: 7
xpos: 4
ypos: 7
Spectral/Bohr images
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3D Model