Question

Which properties do metalloids share with metals?

Both are shiny and are brittle.
Both are very conductive and are dull.
Both are brittle and are gases at room temperature.
Both are shiny and are solid at room temperature.

Answer 1

Both are shiny and are solid at room temperature.

Many metalloids have a metallic luster (shine) and, like metals, are solids at room temperature, though metalloids are typically brittle and only semiconducting rather than highly conductive.