Here's why:

* Dull in color: Nonmetals generally have a dull or non-reflective appearance.

* Does not conduct electricity: Nonmetals are poor conductors of electricity.

* Does not bend or stretch very much: Nonmetals are generally brittle and break easily rather than bending or stretching.

Examples of nonmetals include:

* Carbon: Found in coal, diamonds, and graphite.

* Sulfur: A yellow solid found in volcanic areas.

* Phosphorus: Used in fertilizers and matches.

* Oxygen: A gas essential for life.

Let me know if you have more questions!