The city of Atlanta, Georgia, in Fulton County, was an important rail and commercial center during the American Civil War. Although relatively small in population, the city became a critical point of contention during the Atlanta Campaign in 1864 when a powerful Union army approached from Union-held Tennessee.
Rare-earth compounds containing lanthanum are extensively used in carbon lighting applications, especially by the motion picture industry for studio lighting and projection.
Lanthanides and actinides are also called inner transition elements. They are placed at the bottom of the periodic table. Each row has its own name. The elements cerium (Ce) through lutetium (Lu) are called the lanthanides and thorium (Th) through lawrencium (Lr) make up the actinides.Except for uranium few of the inner transition elements are well known.The lanthanides begin with lanthanum (La). The 4f energy levels are very close in energy to the 5d levels.he elements cerium (Ce) through lutetium (Lu) are called the lanthanides and thorium (Th) through lawrencium (Lr) make up the actinides. Except for uranium few of the inner transition elements are well known. The lanthanides begin with lanthanum (La). The 4f energy levels are very close in energy to the 5d levels.