Which of the following groups of elements typically exhibit luster (are shiny)?

• A. Nonmetals
• B. Noble gases
• C. Metals
• D. Halogens

Answer: (C)

Verified step by step guidance

1. Understand that luster, or shininess, is a physical property commonly associated with the way a material reflects light from its surface.
2. Recall that metals have a characteristic metallic luster due to the presence of free electrons that can reflect light efficiently.
3. Recognize that nonmetals generally do not exhibit luster; they tend to be dull or transparent rather than shiny.
4. Note that noble gases are gases at room temperature and do not have a solid surface to exhibit luster.
5. Identify halogens as nonmetals that typically do not have metallic luster; they are often colored and can be reactive but not shiny like metals.