Complex sentence: The name halogen, meaning salt producer, was originally defined for chlorine in 1811 by Johann Salomo Christoph Schweigger; the term was applied to the rest of the elements in this family after suggestion by Jöns Jakob Berzelius in 1842.
Split into simpler sentences: The name halogen, meaning "salt producer," was originally used for chlorine in 1811 by Johann Salomo Christoph Schweigger. However, this term was later used as a generic term to describe all the elements in the chlorine family (fluorine, bromine, iodine), after a suggestion by Jöns Jakob Berzelius in 1842.