100
Fm
Fermium
(257)
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#100
Fermium
actinide· Solid·257 u
Fermium is a synthetic element with symbol Fm and atomic number 100. It is a member of the actinide series. It is the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities, although pure fermium metal has not yet been prepared.
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Identity
- Symbol
- Fm
- Atomic Number
- 100
- Atomic Mass
- 257 u
- Category
- actinide
- Block
- f-block
- Period
- 7
- Group
- 3
- Appearance
- Chemical element with atomic number 100 (Fm)
- Year Discovered
- 1952 CE
- Discovered By
- Lawrence Berkeley National Laboratory
- Named By
- Enrico Fermi
Electrons
- Configuration
- [Rn] 5f12 7s2
- Full Configuration
- 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f12
- Shells
- 2, 8, 18, 32, 30, 8, 2
- Electronegativity
- 1.3
- Electron Affinity
- 33.96
- Oxidation States
- +3
- Ionization Energies
- 627
Physical Properties
- State at
- Solid
- Melting Point
- 1800
- Boiling Point
- n/a
- Density
- n/a
- Crystal Structure
- FCC
- Magnetic Ordering
- n/a
Mechanical
Thermal & Electrical
Abundance
- Universe
- 0
- Sun
- 0
- Meteorite
- 0
- Earth's Crust
- 0
- Ocean
- 0
- Human Body
- 0