Which of the following is a characteristic of noble gases?

The characteristic that noble gases are colorless and odorless is accurate because these gases, which include helium, neon, argon, krypton, xenon, and radon, exist in their elemental form as monoatomic gases under standard conditions. This lack of color and odor is due to their very stable electronic configuration, which prevents them from readily interacting with other molecules or particles in the environment.

Noble gases are generally known for their inertness, attributed to having complete valence electron shells. This stability contributes to their colorless and odorless traits, making them unique compared to other elements that often have distinct colors and scents due to their ability to form compounds or react with other substances. Their practical applications, such as in lighting and high-tech equipment, also emphasize the qualities that arise from their inert nature.