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. 1  The lanthanides and actinides are located mostly in the f-block of the periodic table. 2  Lanthanides are used in products such as hybrid cars, superconductors, and permanent magnets. 3  The actinide americium is used in smoke detectors.ctinides are the 15 elements with atomic numbers from 89 to 103. They are named after the first element in the series, actinium. The actinides group includes mostly man-made elements with only a few exceptions such as uranium and thorium.