Carbon: Carbon is a nonmetal that can exist in various solid forms, such as graphite and diamond. Graphite is a soft, black, and opaque solid, while diamond is an extremely hard, transparent solid.
Phosphorus: Phosphorus is a nonmetal that exists as a white solid at room temperature. It is highly reactive and can ignite spontaneously in air.
Sulfur: Sulfur is a nonmetal that exists as a yellow, brittle solid at room temperature. It is insoluble in water but soluble in organic solvents.
Iodine: Iodine is a nonmetallic element that exists as a dark violet, crystalline solid at room temperature. It is slightly soluble in water and more soluble in organic solvents.
Silicon: Silicon is a solid nonmetal that is essential for the semiconductor industry. It exists as a dark gray solid with a crystalline structure at room temperature.
