|
|
Pronunciation | |
---|
Appearance | silvery |
---|
Mass number | [247] |
---|
|
|
Group | f-block groups (no number) |
---|
Period | period 7 |
---|
Block | f-block |
---|
Electron configuration | [Rn] 5f9 7s2 |
---|
Electrons per shell | 2, 8, 18, 32, 27, 8, 2 |
---|
|
Phase at STP | solid |
---|
Melting point | beta: 1259 K (986 °C, 1807 °F) |
---|
Boiling point | beta: 2900 K (2627 °C, 4760 °F) |
---|
Density (near r.t.) | alpha: 14.78 g/cm3 beta: 13.25 g/cm3 |
---|
|
Oxidation states | +2, +3, +4, +5[1] |
---|
Electronegativity | Pauling scale: 1.3 |
---|
Ionization energies | |
---|
Atomic radius | empirical: 170 pm |
---|
Spectral lines of berkelium |
|
Natural occurrence | synthetic |
---|
Crystal structure | hexagonal close-packed (hcp) |
---|
Thermal conductivity | 10 W/(m⋅K) |
---|
Magnetic ordering | paramagnetic |
---|
CAS Number | 7440-40-6 |
---|
|
Discovery | 1949 |
---|
|
|
|
|
Category: Berkelium | references |