Carbon exists in different forms called allotropes. Diamond, the hardest natural substance with a high melting and boiling point, and graphite, a conductor of electricity, are two allotropes of carbon.

Iodine, despite being a non-metal, exhibits luster, which is a characteristic property of metals.

Electric wires are coated to insulate and protect against electric shock. Metals that produce a sound on striking a hard surface are termed sonorous.

Metals such as copper, aluminum, and stainless steel are commonly used for making cooking vessels because of their malleability, ductility, good heat conductivity, and high melting points.

The ability of metals to be drawn into thin wires is known as ductility, and gold is mentioned as the most ductile metal.