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

Curium, the properties of atoms, chemical and physical properties.

 

 

 

Cm 96 Curium

247,0703 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p6 5f7 6d1 7s2

 

Curium — element of the periodic system of chemical elements of Mendeleev with atomic number 96. 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 Curium/ Curium
Symbol Cm
Room at the table 96
Type Metal
Open G. Seaborg, A. Ghiorso, L. O. Morgan and R. A. James, USA, 1944
Appearance, etc. A silvery radioactive 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) 247,0703 and. E. M. (g/mol)
Electronic configuration 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p6 5f7 6d1 7s2
The radius of the atom 174 PM

Chemical properties

 
Oxidation +4, +3
Valence +3, +4
Covalent radius 169±3 PM
The radius of the ion
Radius van der Waals
Electronegativity Of 1.3 (scale Pauling)
Energy of ionization (the first electron) 581 kJ/mol (of 6.02 eV)
Electrode potential -2,06 IN, -1,2 IN

Physical properties

Density (under normal conditions) 13,51 g/cm3
Melting point 1340 °C (1613 K)
Boiling point 3110 °C (3383 K)
UD. the heat of fusion 13,85 kJ/mol
UD. heat of evaporation
Molar heat capacity 27 j/(K·mol)
Molar volume Of 18.28 cm3/mol
The thermal conductivity (at 300 K)
The electrical conductivity in the solid phase
Superconductivity at a temperature of
Hardness
The lattice structure hexagonal
The lattice parameters a = 3,496 Å, c =of 11.33 Å
The ratio c/a 3,24
Debye Temperature

 

 

Table of chemical elements of D. I. Mendeleev