Question

8
brandon is trying to remember how the physical and chemical properties of metals, nonmetals, and metalloids compare. he wrote
some notes down, then looked in his textbook to see which notes were correct.
which of brandons notes, listed below, are correct?
i. metals are the best at conducting heat, and nonmetals are the worst.
ii. metals are the worst at conducting electricity, and nonmetals are the best.
iii. the shape of nonmetals is easy to change, but the shape of metals or metalloids is difficult to change.
iv. nonmetals are dull in appearance while metals are usually shiny.
v. metals tend to have a high density, and nonmetals tend to have a low density.
a. i, ii, iii, iv, and v
b. ii, iii, and v only
c. i, iv, and v only
d. i, ii, and iii only

Explanation:

• I: Metals are good heat conductors; nonmetals are poor. Correct.
• II: Metals conduct electricity well; nonmetals do not. Incorrect.
• III: Metals are malleable (shape easy to change); nonmetals are brittle. Incorrect.
• IV: Metals are shiny; nonmetals are dull. Correct.
• V: Metals have high density; nonmetals have low density. Correct.

Only I, IV, V are correct.

Answer:

C. I, IV and V only