Fermium

Fermium is a chemical element with the symbol Fm and atomic number 100. It is a synthetic element and is part of the actinide series. Fermium is a radioactive metal, produced in minute amounts in nuclear reactions. It is named after the physicist Enrico Fermi. Fermium has no significant commercial applications but is used in research and for the production of heavier elements.

Overview

English Name:

Fermium

Latin Name:

Fermium

Year Discovered:

1952

Discovered By:

Albert Ghiorso, et al.

Group:

Actinides

Period:

7

Electrons:

100

CAS Number:

7440-72-4

Cost Per 100 Grams:

Unknown

Atomic Properties

Electronic Configuration:

[Rn] 5f12 7s2

Ion Charge:

+3

Ionisation Energies:

~6.5 eV

Atomic Radius (Empirical):

~200 pm

Atomic Radius (Calculated):

~200 pm

Covalent Radius:

~200 pm

Van Der Waals Radius:

N/A

Ionisation Potential of An Atom:

~6.5 eV

Electrons Per Layer:

2, 8, 18, 32, 32, 8, 2

Atomic Multiplicities Of The Gas:

1

Atomic Weight:

257

Oxidation States

+3
+2

Reactivity

Electron Affinity:

Unknown

Valence:

3

Electronegativity:

Unknown

Thermal Properties

Melting Point:

~1527°C

Boiling Point:

~2600°C

Critical Point:

Pressure: N/A

Temperature: N/A

Thermal Conductivity:

Unknown

Heat Capacity:

Specific: Unknown

Molar: Unknown

Thermal Coefficient:

Unknown

Enthalpy:

Fusion: Unknown

Vaporisation: Unknown

Atomization: Unknown

Curie Temperature:

N/A

Neel Temperature:

N/A

Superconductivity Point:

N/A

Physical and Chemical Properties

State of matter (25° C/ 77°F):

Solid

Density:

Solid: ~9.7 g/cm³

Molar Volume (Vmol):

~26.4 cm³/mol

Speed of Sound (Vs):

Unknown

Hardness:

N/A

Bulk Modulus (K):

Unknown

Shear Modulus (G):

N/A

Young's Modulus (E):

N/A

Color:

Silvery

Brinell Hardness (MPa):

N/A

Liquid Density (Kg/m^3):

Unknown

Hardness of Mohs:

N/A

Refractive Index:

N/A

Vickers Hardness (MPa):

N/A

Crystal Structure:

N/A

Electromagnetic Properties

Electrical Type:

Conductor

Resistivity:

Unknown

Magnetic Type:

Paramagnetic

Superconductivity:

Not applicable

Volume Magnetic Susceptibility:

Unknown

Mass Magnetic Susceptibility:

Unknown

Molar Mass Susceptibility:

Unknown

Electrical Conductivity:

Unknown

Mass (γmass):

Unknown

Mass (γmol):

Unknown

Volume (γvol):

Unknown

Grid Parameters

Crystal Structure:

N/A

Grid Parameters:

N/A

Attitude:

N/A

Debye Temperature:

N/A

Safety and Precautions

Signal Word:

Danger

Hazard Statements:

H300, H340

Precautionary Statements:

P201, P202, P281, P308

RTECS Number:

Unknown

Risk:

Flammability: Not flammable
Health Risk: Radioactive
Reactivity: Stable
Specific Risk: Radiation hazard

Importance

Main sources:

Produced in nuclear reactors

Main Usage:

Research, neutron sources

Nuclear Properties

Radioactive:

Yes

Isotopes:

Fm-257

Neutron Cross Sectional:

Unknown

Half Life (s):

~100.5 days

Lifetime:

Stable

Prevalence

Universe:

Trace

Sun:

Trace

Oceans:

Trace

Humans:

Trace

Earth's Crust:

Trace

Meteorites:

Trace