Question 1

Which of the following best describes the arrangement of particles in a crystalline solid?

Accepted Answer

Particles are arranged in a highly ordered, repeating pattern throughout.

Question 2

Olive oil slowly hardens and forms a solid over a range of temperatures as it cools. Which type of solid does olive oil most likely form?

Accepted Answer

Amorphous solid

Question 3

Which of the following solids is best classified as a covalent network solid?

Accepted Answer

Graphite

Question 4

A solid is hard, does not conduct electricity, and melts at 1400$$^\circC. $$Which type of solid is this most likely to be?

Accepted Answer

Covalent network solid

Question 5

Which of the following is an example of an ionic solid?

Accepted Answer

AlF$$_3$$

Question 6

Which of the following best describes the major electrostatic force within an ammonia (NH$$_3) $$molecule?

Accepted Answer

Covalent bond

Question 7

Steel is best classified as which type of solid?

Accepted Answer

Alloy

Question 8

Which property is most characteristic of metallic solids?

Accepted Answer

High electrical conductivity due to delocalized electrons

Question 9

Which of the following statements about amorphous solids is correct?

Accepted Answer

They soften over a range of temperatures rather than melting sharply.

Question 10

Bronze, an alloy of copper and tin, is best classified as which type of solid?

Accepted Answer

Alloy

Question 11

Which of the following best explains why ionic solids are typically brittle?

Accepted Answer

Shifting layers bring like-charged ions next to each other, causing repulsion.

Question 12

Which solid type is most likely to have a high melting point, be hard, and not conduct electricity in any state?

Accepted Answer

Covalent network solid

Question 13

Which of the following best describes the bonding in metallic solids?

Accepted Answer

Cations surrounded by a sea of delocalized electrons

Question 14

CO$$_2 ($$solid carbon dioxide, dry ice) is best classified as which type of solid?

Accepted Answer

Molecular solid

Question 15

Which of the following is a property of covalent network solids such as diamond or quartz?

Accepted Answer

They are hard and have very high melting points.

Question 16

A chemist is designing a new plastic material. Which type of solid is this material most likely to be?

Accepted Answer

Amorphous solid

Question 17

Which of the following best describes the smallest repeating unit in a crystalline solid?

Accepted Answer

Unit cell

Question 18

Which of the following solids is most likely to be soluble in water and conduct electricity when dissolved?

Accepted Answer

Ionic solid

Question 19

Which of the following best explains why molecular solids like dry ice (CO$$_2) $$have low melting points?

Accepted Answer

They are held together by weak intermolecular forces.

Question 20

CaCO$$_3 ($$calcium carbonate) is best classified as which type of solid?

Accepted Answer

Ionic solid

The Chemistry of Solids: Classification, Properties, and Examples

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