97 2 · 8 · 18 · 32 · 27 · 8 · 2

Berkelium, Bk, element 97

Actinide· Period 7· f-block

Configuration [Rn]5f97s2

Atomic weight
247Da
Phase
solid
Density
14.78g/cm³
Melting point
1,259.15K 986 °C
Boiling point
2,900K 2,627 °C
Electronegativity
1.3

Radioactive metallic transuranic element. Belongs to actinoid series. Eight known isotopes, the most common Bk-247, has a half-life of 1.4*10^3 years. First produced by Glenn T. Seaborg and associates in 1949 by bombarding americium-241 with alpha particles. 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 berkelium

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]5f97s2
Source: mendeleev
Electron configuration in full The electron configuration with the noble-gas core written out.
1s22s22p63s23p63d104s24p64d104f145s25p65d105f96s26p67s2
Source: Worked outfrom electron configuration
Electrons in each shell Counted from the electron configuration, from the first shell outward.
2 · 8 · 18 · 32 · 27 · 8 · 2
Source: Worked outfrom electron configuration

No data uncertainty of the atomic weight.