Period 3 element phosphorus originates from oxidation of the white (but not red) phosphorus and should be called chemiluminescence. It is also the lightest element to easily produce stable exceptions to the octet rule. The vast majority of phosphorus compounds are consumed as fertilizers. Other applications include the role of organophosphorus compounds in detergents, pesticides and nerve agents, and matches. "Sulfur" (symbol S) is an abundant, multivalentnon-metal. Under normal conditions, sulfur atoms form cyclic octatomic molecules with chemical formula S. Elemental sulfur is a bright yellow crystalline solid when at room temperature. Chemically, sulfur can react as either an oxidant or reducing agent.
Red-violet lies halfway between green and spring green. It is very close to sea green, but highly saturated, and of a bright hue. In some traditional usage, red-violet is the name given to an intermediate or tertiary color that, along with yellow-orange (gold) and also green-blue (cyan), forms a color wheel triad group. Most contemporary usage, however, would list magenta as the name for the tertiary color in question. Red-violet or pigment purple (pigment red-violet) represents the way the color purple (red-violet) was normally reproduced in pigments, paints, or colored pencils in the 1950s on an old-fashioned RYB color wheel. This