100
Fm
Fermium
Fermium
Fermium (Fm)
Actinides · Solid · Period 7 · Group 3
Element Properties
- Atomic Number
- 100
- Symbol
- Fm
- Atomic Mass
- 257.0951
- Category
- Actinides
- Standard State
- Solid
- Period
- 7
- Group
- 3
- Electronegativity
- 1.3
- Atomic Radius
- —
- Ionization Energy
- 6.5
- Electron Affinity
- —
- Oxidation States
- +3
- Melting Point
- 1800 K (1526.85 °C)
- Boiling Point
- —
- Density
- —
- Electron Configuration
- [Rn] 5f12 7s2
- Year Discovered
- 1952
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Frequently asked questions
What is the atomic number of Fermium?
The atomic number of Fermium is 100, which equals the number of protons in its nucleus.
What is the atomic mass of Fermium?
The atomic mass of Fermium is approximately 257.0951 u (one twelfth of the mass of a carbon-12 atom).
What is the electron configuration of Fermium?
The electron configuration of Fermium is [Rn] 5f12 7s2.
Where is Fermium in the periodic table?
Fermium is located in period 7, group 3.
When was Fermium discovered?
Fermium was discovered in 1952.
Related elements
Same group
21
Sc
Scandium
44.956
39
Y
Yttrium
88.906
57
La
Lanthanum
138.905
58
Ce
Cerium
140.116
59
Pr
Praseodymium
140.908
60
Nd
Neodymium
144.24