96 2 · 8 · 18 · 32 · 25 · 9 · 2

Curium, Cm, element 96

Actinide· Period 7· f-block

Configuration [Rn]5f76d17s2

Atomic weight
247Da
Phase
solid
Density
13.51g/cm³
Melting point
1,618.15K 1,345 °C
Boiling point
3,383K 3,110 °C
Electronegativity
1.3

Radioactive metallic transuranic element. Belongs to actinoid series. Nine known isotopes, Cm-247 has a half-life of 1.64*10^7 years. First identified by Glenn T. Seaborg and associates in 1944, first produced by L.B. Werner and I. Perlman in 1947 by bombarding americium-241 with Neutrons. Named for Marie Curie. Description from mendeleev.

Back to the table
The outermost shell: the valence electronsThe inner shellsThe nucleus One bead for each electron, on the ring of its shell, counted from the nucleus out. The rings turn at their own pace; the model is Bohr's picture of the atom, which places electrons in shells but not on true orbits.

Atomic properties

4 of 5 fields have a value for curium

Atomic weight The standard atomic weight. For an element with no stable isotope, the mass of its longest-lived isotope.
247Da
Source: mendeleev
Electron configuration
[Rn]5f76d17s2
Source: mendeleev
Electron configuration in full The electron configuration with the noble-gas core written out.
1s22s22p63s23p63d104s24p64d104f145s25p65d105f76s26p66d17s2
Source: Worked outfrom electron configuration
Electrons in each shell Counted from the electron configuration, from the first shell outward.
2 · 8 · 18 · 32 · 25 · 9 · 2
Source: Worked outfrom electron configuration

No data uncertainty of the atomic weight.