Question

which properties are characteristic of metalloids?
○ high electrical conductivity and a high melting point
○ low electrical conductivity and a low melting point
○ intermediate conductivity and a high melting point
○ intermediate conductivity and a low melting point

Explanation:

Metalloids have properties intermediate between metals and non - metals. Metals have high electrical conductivity and often high melting points, non - metals have low electrical conductivity and often low melting points. Metalloids show intermediate electrical conductivity. Also, many metalloids have relatively high melting points (e.g., silicon has a high melting point). So the property of metalloids is intermediate conductivity and a high melting point.

Answer:

intermediate conductivity and a high melting point (the fourth option in the list of choices)