Which of the following characteristics is typical of metals?

Metals are typically characterized by their shiny appearance and malleability, which is the ability to be bent and shaped without breaking. This characteristic is due to the metallic bond present in metals, allowing them to deform under stress while maintaining structural integrity. The shiny luster is a result of the way metals reflect light, as their electrons can move freely, contributing to a smooth, reflective surface. Malleability and ductility make metals useful in various applications, such as in construction, electronics, and manufacturing, where they can be shaped into wires or sheets without fracturing.

The other options describe traits not representative of metals. For instance, brittleness is more typical of nonmetals, while non-malleability and non-ductility refer to materials that cannot be easily shaped, which also does not apply to metals. Opaque and odorless properties do not distinctly categorize materials as metals, as many substances, including nonmetals and compounds, can share these traits.