This document provides brief descriptions of elements 5 through 9 on the periodic table - boron, carbon, nitrogen, oxygen, and fluorine. It notes that boron is used in flares and rockets due to its green color. Carbon is most commonly obtained from coal deposits. Nitrogen is obtained from air through fractional distillation. Oxygen is highly reactive and combines with most elements. Fluorine is the most reactive element and no substance can free it from compounds.