SOLAR SYSTEM

Detailed explanation-1: -Luster: Nonmetals are generally nonreflective, dull, and lack a shiny or metallic surface. Density: Nonmetals are generally less dense than metals. Physical forms: Nonmetals exist in solid, liquid, or gas forms at room temperature.

Detailed explanation-2: -Nonmetal Physical Properties: Not lustrous (dull appearance) Poor conductors of heat and electricity.

Detailed explanation-3: -Non-metals vary greatly in appearance. They do not have lustre. As it does not have any free electrons light falling on non-metals does not reflect and hence non-metals are not shiny. Hence, they have a very dull appearance.

Detailed explanation-4: -Elements like O (oxygen) and H (hydrogen) are members of nonmetals. They can be a solid or a gas at room temperature. They have an appearance that is dull or without luster.

Detailed explanation-5: -Note: Non-metals are considered as insulators because they have extremely high resistance to the flow of charge through them. The atoms hold onto their electrons tightly and so they cannot conduct electricity.