Stable isotope Curium (Cm)

Isotope Atomic Mass Half-life Mode of Decay Nuclear Spin Nuclear Magnetic Moment
Cm-240 240.05552 27 hours α to Pu-236; EC to Am-240; SF 0 No data available
Cm-241 241.05765 32.80 days α to Pu-237; EC to Am-241 1/2 No data available
Cm-242 242.05883 162.80 days α to Pu-238; SF 0 No data available
Cm-243 243.06138 28.50 years α to Pu-239; EC to Am-243 5/2 0.41
Cm-244 244.06275 18.11 years α to Pu-240; SF 0 No data available
Cm-245 245.06548 8500 years α to Pu-241; SF 7/2 No data available
Cm-246 246.06722 4780 years α to Pu-242; SF 0 No data available
Cm-247 247.070347 1.56 x 107 years α to Pu-243 9/2 0.37
Cm-248 248.07234 3.40 x 105 years α to Pu-244; SF 0 No data available
Cm-249 249.07595 64.15 minutes ß- to Bk-249 1/2 No data available
Cm-250 250.07835 9700 years α to Pu-246; ß- to Bk-250; SF 0 No data available

Properties of Curium

Name Curium
Symbol Cm
Atomic number 96
Atomic weight [247]
Standard state Solid at 298 °K
CAS Registry ID 7440-51-9
Group in periodic table N/A
Group name Actinoid
Period in periodic table 7 (Actinoid)
Block in periodic table f-block
Color Silver
Classification Metallic
Melting point 1613 °K [or 1340 °C or 2444 °F]
Boiling point 3383 °K [or 3110 °C or 5630 °F]
Density of solid 13.51 g/cm3
Electron configuration [Rn]5f76d17s2