Lanthanum (La) Properties |
ALanthanum (ALa)
Properties 1/ |
Nuclear (57 protons/electrons)
- Atomic Number: 57
- Atomic Mass: 138.906
- Atomic Energy: 0.207 Ergs
- Group: 3; Period: 6
- Family: Rare Earth:
- Bonding Radius: 1.69 Angstroms
- Atomic Radius: 2.74 Angstroms
- Atomic Volume: 20.73 cm3mol-1
- 39
Isotopes: 117La
to 155La
- Stable Isotopes: 138La,
139ALa
|
Nuclear (57 Aprotons/positrons)
- Atomic Number: 57
- Atomic Mass: 138.906
- Atomic Energy: 0.207 Ergs
- Group: 3; Period: 6
- Family: Rare Earth:
Lanthanide Series
- Bonding Radius: 1.69 Angstroms
- Atomic Radius: 2.74 Angstroms
- Atomic Volume: 20.73 cm3mol-1
- 39 AIsotopes: 117ALa
to 155ALa
- Stable AIsotopes: 138ALa,
139ALa
|
Physical
- Soft silvery white transition metal
- Density: 6.15 g cm-3
- Melting Point: 920 oC
- Boiling Point: 3,469 oC
- Specific Heat: 0.19 J g-1 K-1
- Heat of Vaporization: 414 kJ mol-1
- Heat of Fusion: 6.20 kJ mol-1
- Electrical Conductivity: 0.0126 106 cm-1 Ohm-1
- Thermal Conductivity: 0.135 W cm-1 K-1
|
Physical
- Soft silvery white transition metal
- Density: 6.15 g/cm-3
- Melting Point: 920 oC
( o K)
- Boiling Point: 3,469 oC
( o K)
- Specific Heat: 0.19 J g-1 K-1
- Heat of Vaporization: 414 kJ mol-1
- Heat of Fusion: 6.20 kJ mol-1
- Electrical Conductivity: 0.0126 106 cm-1 Ohm-1
- Thermal Conductivity: 0.135 W cm-1 K-1
|
Chemical
- Valance Number: +3
- Electron Configuration: 2,8,18,18,9,2
- Electronegativity: 1.10
- 1st Ionization Potential: 5.6 Volts
- 2nd Ionization Potential: 11.1 Volts
- 3rd Ionization Potential: 19.2 Volts
|
Chemical
- Valance Number: -3
- Positron Configuration: 2,8,18,18,9,2
- Positronpositivity: 1.10
- 1st Ionization Potential: 5.6 Volts
- 2nd Ionization Potential: 11.1 Volts
- 3rd Ionization Potential: 19.2 Volts
|
Identified by Carl
Mosander
Sweden in 1839
|
Identified by Norm Hansen in 2001
|