My CSS / Adsense

Lanthanum

La

INTRODUCTION

Lanthanum is a metallic element, often regarded as the first member of the lanthanide series, to which it gives its name was derive.It burns in air at about 450°C (about 842°F) to form lanthanum oxide.

Lanthanum is quite regular, and similar to the trends in the group 1 and 2.It is mostly found together with the lanthanide elements in bastnaesite, monazite, and other minerals which is extremely difficult to seperate individual element.

BASIC INFORMATIONS

  • Atomic Number
  • 57
  • Atomic Mass
  • 138.90547
  • Atomic radius
  • 0.169
  • Ionization energy
  • 541
  • Electronic config
  • 2,8,18,18,9,2
  • Principal Valency
  • +2
  • Density g/cm³
  • 6.17
  • Melting point °C
  • 920
  • Boiling point °C
  • 3464
  • Type of Element
  • Metal
  • Electronegativity
  • 1.1
  • Element Category
  • Scandium Group
  • Appearance
  • Silvery white solid
  • Block
  • d-block
  • Period
  • 6
  • Group
  • 3
  • No of Isotopes
  • 39
  • Occurrence
  • Combine form
  • Abundance in ppm
  • 35
  • Year of Discovery
  • 1839

EXTRACTION

It is extracted by the electrolysis of it's fused salt

OXIDATION STATES

+3,+2 (Strongly basic)

MAJOR SOURCE

Bastnasite, Monazite

EXAMPLES OF COMPOUND PRESENT

Lanthanum oxide, Lanthanum trichloride

ECONOMIC IMPORTANCE

* Impure lanthanum is used in alloys such as misch metal, of which lanthanum is a major constituent.

* It is used in optical glass such as crooke's lenses, which give protection against Ultra Violet light

Developed by successtar (+2347061855688).