Input interpretation
curium (chemical element)
Periodic table location
Periodic table location
Basic elemental properties
![atomic symbol | Cm atomic number | 96 short electronic configuration | [Rn]7s^25f^76d^1 Aufbau diagram | 6d 5f 7s block | f period | 7 atomic mass | 247 u (unified atomic mass units) (atomic mass number given for longest-lived isotope) half-life | 15.6 Myr (megayears)](../image_source/6aab99cc6e78374b0885a7277c163adb.png)
atomic symbol | Cm atomic number | 96 short electronic configuration | [Rn]7s^25f^76d^1 Aufbau diagram | 6d 5f 7s block | f period | 7 atomic mass | 247 u (unified atomic mass units) (atomic mass number given for longest-lived isotope) half-life | 15.6 Myr (megayears)
Thermodynamic properties
phase at STP | solid melting point | 1345 °C (rank: 36th) boiling point | 3110 °C (rank: 31st) (properties at standard conditions)
Material properties
density | 13.51 g/cm^3 (rank: 16th) molar volume | 18.3 cm^3/mol (properties at standard conditions)
Electromagnetic properties
color | (silver)
Reactivity
valence | 4 electronegativity | 1.3 first ionization energy | 581 kJ/mol (kilojoules per mole) ionization energies | 581 kJ/mol
Atomic properties
term symbol | ^9D_2 covalent radius | 169 pm (electronic ground state properties)
(neutral curium atomic spectrum)
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 | 15.6 Myr lifetime | 23 Myr (rank: 1st) specific radioactivity | 3.434 MBq/g decay mode | alpha emission nuclear spin | Cm-233: 3/2^+ | Cm-234: 0^+ | Cm-235: 5/2^+ | Cm-236: 0^+ | Cm-237: 5/2^+ | Cm-238: 0^+ | Cm-239: 7/2^- | Cm-240: 0^+ | Cm-241: 1/2^+ | Cm-242: 0^+ | Cm-243: 5/2^+ | Cm-244: 0^+ | Cm-245: 7/2^+ | Cm-246: 0^+ | Cm-247: 9/2^- | Cm-248: 0^+ | Cm-249: 1/2^+ | Cm-250: 0^+ | Cm-251: 1/2^+ | Cm-252: 0^+ unstable isotopes | Cm-247 (15.6 Myr) | Cm-248 (0.35 Myr) | Cm-245 (8600 yr) | Cm-250 (8305 yr) | Cm-246 (4800 yr) | Cm-243 (29.1 yr) | Cm-244 (18.1 yr) | Cm-242 (162.8 days) | Cm-241 (32.8 days) | Cm-240 (27 days) | Cm-252 (50 h) | Cm-239 (170 min) | Cm-238 (140 min) | Cm-249 (64.15 min) | Cm-237 (20 min) | Cm-251 (16.83 min) | Cm-236 (10 min) | Cm-235 (5 min) | Cm-233 (60 s) | Cm-234 (51 s) neutron cross-section | 60 b
Identifiers
CAS number | 7440-51-9 PubChem CID number | 23979