Fm
Fermium
العنصر 100 · 257.09511 u
Fermium is the heaviest element that can be produced by neutron capture.
Physical Properties
| الكتلة الذرية | 257.09511 u |
| الكثافة | 9.7 g/cm³ |
| Melting Point | 1800.0 K |
| المظهر | Silvery metallic (predicted) |
| State at Room Temp | Solid |
الخواص الكيميائية
| السالبية الكهربائية | 1.3 (Pauling) |
| طاقة التأين الأولى | 627.0 kJ/mol |
| القرب الإلكتروني | 33.96 kJ/mol |
| Oxidation States | +2, +3 |
الخصائص الذرية
| تشكيل الإلكترون | [Rn] 5f12 7s2 |
اكتشاف
| اكتشفها | Albert Ghiorso and others |
| سنة الاكتشاف | 1952 |
| الموقع | Berkeley, California, USA |
| Named After | Named after Enrico Fermi, pioneer of nuclear reactors |
عن Fermium
Fermium was co-discovered with einsteinium in hydrogen bomb debris. It is the heaviest element producible by neutron bombardment. Only tiny amounts have been made.
Uses & Applications
No practical applications. Scientific research only.
حقيقة مضحكة
Fermium is the heaviest element producible by neutron bombardment. Anything heavier requires smashing nuclei together in accelerators.
النظائر
| Mass Number | الوفرة | نصف العمر | Stable |
| 255 | - | 20.07 hours | No |
| 257 | - | 100.5 days | No |
تشكيل الإلكترون
[Rn] 5f12 7s2