La
57lanthanideGenerado con IA1 min de lectura
Lantano
SímboloLa
Masa Atómica138.905477
Lanthanum is a soft, ductile, silvery-white metallic chemical element with symbol La and atomic number 57. It tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. It gave its name to the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table:it is also sometimes considered the first element of the 6th-period transition metals.
Properties
- Phase: Solid
- Density: 6.162 g/cm³
- Melting Point: 1193 K
- Boiling Point: 3737 K