Input interpretation
rutherfordium (chemical element)
Periodic table location
Periodic table location
Basic elemental properties
![atomic symbol | Rf atomic number | 104 short electronic configuration | [Rn]7s^25f^146d^2 Aufbau diagram | 6d 5f 7s block | d group | 4 period | 7 atomic mass | 267 u (unified atomic mass units) (atomic mass number given for longest-lived known isotope) half-life | 13 hours](../image_source/84566d187214172b1c754c4fd607ad3d.png)
atomic symbol | Rf atomic number | 104 short electronic configuration | [Rn]7s^25f^146d^2 Aufbau diagram | 6d 5f 7s block | d group | 4 period | 7 atomic mass | 267 u (unified atomic mass units) (atomic mass number given for longest-lived known isotope) half-life | 13 hours
Reactivity
valence | 4
Atomic properties
term symbol | ^3F_2 (electronic ground state properties)
Abundances
solar abundance | 0 mass% meteorite abundance | 0 mass% crust abundance | 0 mass% ocean abundance | 0 mass% human abundance | 0 mass% solar molar abundance | 0 mol% meteorite molar abundance | 0 mol% ocean molar abundance | 0 mol% crust molar abundance | 0 mol% human molar abundance | 0 mol%
Nuclear properties
half-life | 13 h lifetime | 19 h (rank: 1st) specific radioactivity | 33169 TBq/g decay mode | alpha emission nuclear spin | Rf-253: 7/2^+ | Rf-254: 0^+ | Rf-255: 9/2^- | Rf-256: 0^+ | Rf-257: 1/2^+ | Rf-258: 0^+ | Rf-259: 7/2^+ | Rf-260: 0^+ | Rf-261: 3/2^+ | Rf-262: 0^+ | Rf-263: 3/2^+ | Rf-264: 0^+ | Rf-265: 3/2^+ | Rf-266: 0^+ | Rf-268: 0^+ unstable isotopes | Rf-265 (13 h) | Rf-266 (10 h) | Rf-267 (5.6 h) | Rf-268 (67 min) | Rf-264 (67 min) | Rf-263 (10 min) | Rf-261 (65 s) | Rf-257 (4.7 s) | Rf-259 (3.2 s) | Rf-262 (2.3 s) | Rf-255 (1.68 s) | Rf-260 (21 ms) | Rf-253 (13 ms) | Rf-258 (12 ms) | Rf-256 (6.45 ms) | Rf-254 (23 µs)
Identifiers
CAS number | 53850-36-5