100
Fm
Fermium
(257) | 2
8
18
32
30
8
2
|
100
Fm
Fermium
(257) | 2
8
18
32
30
8
2
|
| General |
|---|
| Name | Fermium | | Symbol | Fm | | Number | 100 | | Chemical series | Actinides | | Group / Period | 0 / 7 | | Block | f-block | | CAS registry number | 7440-72-4 |
| Physical properties |
|---|
| State | solid | | Density | g/cm3 | | Melting point | 1800 K (1527 °C, 2781 °F) | | Boiling point | | | Critical point | |
| Atomic properties |
|---|
| Atomic Weight | (257) g/mol | | Crystal structure | | | Electronegativity | 1.30 | | Atomic radius | | | Atomic radius (calculated) | | | Electron configuration | [Rn] 5f12 7s2 | | Electrons per shell | 2, 8, 18, 32, 30, 8, 2 | | Number of protons | 100 | | Number of neutrons | 157 |
|
Mendelevium