What are the physical characteristics of Helium (He)?

Helium is best described as colorless, odorless, and tasteless, which is a fundamental attribute of the gas. These characteristics make helium unique compared to many other substances, which often have distinct colors, odors, or flavors. In a clinical or educational setting, understanding the physical properties of gases like helium is essential for safe handling and effective medical uses such as in respiratory therapies or diagnostic applications.

While helium's lack of color, smell, and taste is crucial in its identification, the other options inaccurately describe its properties. For example, describing helium as having a slightly acidic taste or a sweet-smelling characteristic misrepresents its known attributes in both scientific and practical applications. These misconceptions can lead to misinformation about helium's use in medical settings, emphasizing the importance of recognizing its true characteristics for safe and effective practices.