Which of the following are properties of metalloids?

The elements on each side of the zigzag line in the periodic table that separates metals from non-metals are known as metalloids because they exhibit both metal and non-metal properties. They display both the chemical and physical characteristics of metals and nonmetals.

Metalloids are substances that have properties of both metals and non-metals. They are solids but majorly show the physical properties of non-metals. They are also called semi-metals. They can be made to conduct electricity. And due to this, they are used in semiconductors. Examples include Germanium, Silicon, etc.

Hence, option D is correct.