Which of the following is NOT a typical property of metals?

Metals are generally characterized by specific properties that define their behavior and applications. One key characteristic is that they are malleable, which means they can be hammered or pressed into shapes without breaking. This property is widely utilized in manufacturing and construction. Additionally, metals are typically good conductors of electricity, allowing them to effectively carry electric current, which is crucial for numerous electrical applications. They also tend to have a shiny appearance, giving them a lustrous quality that is visually appealing.

In contrast, brittleness is not a typical property of metals. Brittle materials tend to break or shatter when subjected to stress rather than deforming, which is contrary to the nature of metals that generally exhibit ductility and malleability. Thus, the assertion that brittleness is a characteristic of metals is inaccurate, making it the correct response to the question.