Input interpretation
lawrencium (chemical element)
Periodic table location
Periodic table location
Basic elemental properties
![atomic symbol | Lr atomic number | 103 short electronic configuration | [Rn]7s^25f^147p^1 Aufbau diagram | 7p 5f 7s block | d group | 3 period | 7 atomic mass | 262 u (unified atomic mass units) (atomic mass number given for longest-lived known isotope) half-life | 10 hours](../image_source/3765eb509b5e483458555ae2b90a1fcc.png)
atomic symbol | Lr atomic number | 103 short electronic configuration | [Rn]7s^25f^147p^1 Aufbau diagram | 7p 5f 7s block | d group | 3 period | 7 atomic mass | 262 u (unified atomic mass units) (atomic mass number given for longest-lived known isotope) half-life | 10 hours
Thermodynamic properties
melting point | 1627 °C (rank: 21st) (properties at standard conditions)
Reactivity
valence | 3
Atomic properties
term symbol | ^2P_(1/2) (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 | 10 h lifetime | 14 h (rank: 1st) specific radioactivity | 44202 TBq/g decay mode | alpha emission nuclear spin | Lr-253: 7/2^- | Lr-255: 7/2^- | Lr-257: 9/2^+ | Lr-259: 9/2^+ unstable isotopes | Lr-265 (10 h) | Lr-264 (10 h) | Lr-263 (5.6 h) | Lr-262 (4 h) | Lr-266 (67 min) | Lr-261 (38 min) | Lr-260 (180 s) | Lr-256 (27 s) | Lr-255 (22 s) | Lr-254 (13 s) | Lr-259 (6.2 s) | Lr-258 (4.1 s) | Lr-257 (646 ms) | Lr-253 (570 ms) | Lr-252 (360 ms) | Lr-251 (150 µs)
Identifiers
CAS number | 22537-19-5