The fermium atomic mass oxidation number valence density boiling point melting point physical chemical properties the structure of the conductivity the conductivity of the crystal lattice

The fermium, the properties of atoms, chemical and physical properties.

 

 

 

Fm 100 Fermium

257,0951 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p6 7s2 5f12

 

The fermium — element of the periodic system of chemical elements D. I. Mendeleev, with atomic number 100. Located in the 3rd group (old classification — side subgroup of the third group), the seventh period of the periodic system. Belongs to the group of actinides.

 

General information

Properties of an atom

Chemical properties

Physical properties

Table of chemical elements of D. I. Mendeleev

 


General information

 
Name The Fermium/ Fermium
Symbol Fe
Room at the table 100
Type Metal
Open National laboratory named. Lawrence Berkeley, USA, 1952
Appearance, etc. A radioactive silvery-white metal
The contents in the earth’s crust 0 %. Obtained by synthesis.
The contents in the ocean 0 %

Properties of an atom

 
The atomic mass (molar mass) 257,0951 and. E. M. (g/mol)
Electronic configuration 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p6 7s2 5f12
The radius of the atom

Chemical properties

 
Oxidation +4, +3, +2
Valence +4, +3, +2
Covalent radius
The radius of the ion
Radius van der Waals
Electronegativity Of 1.3 (scale Pauling)
Energy of ionization (the first electron) 627 kJ/mol (of 6.50 eV)
Electrode potential IN -1,96, -2,37 IN

Physical properties

Density (under normal conditions) estimated 9.7 g/cm3
Melting point estimated 1527 °C (1800 K)
Boiling point
UD. the heat of fusion
UD. heat of evaporation
Molar heat capacity
Molar volume
The thermal conductivity (at 300 K)
The electrical conductivity in the solid phase
Superconductivity at a temperature of
Hardness
The lattice structure
The lattice parameters
Debye Temperature

 

Table of chemical elements of D. I. Mendeleev