Properties of Solids: Ionic, Molecular, Metallic

Which of the following most likely describes the solid represented in the diagram above?

• It is molecular and has a low melting point.

• It is molecular and has a high melting point.

• It is ionic and has a high melting point.

• It is ionic and has a low melting point.

Tags

NGSS.HS-PS1-3

Which of the following most likely describes the solid represented in the diagram above?

• It is ionic and is a good conductor as a liquid.

• It is ionic and is a poor conductor of electricity as a liquid.

• It is metallic and is a good conductor of electricity in all phases.

• It is metallic and is a poor conductor of electricity in all phases.

Tags

NGSS.HS-PS1-3

NGSS.HS-PS1-1

Which of the following most likely describes the solid represented in the diagram above?

• It is ionic and hard

• It is ionic and soft

• It is molecular and hard

• It is molecular and soft

Tags

NGSS.HS-PS1-3

Which of the following could be the identity of a white crystalline solid that exhibits the following properties?

-It melts at 1412°C.

-It does not conduct electricity as a solid.

-It conducts electricity in an aqueous solution.

• C₆H₁₂O₆(s)

• MgCl₂(s)

• Cu(s)

• SiO₂(s)

A student is given a sample of a pure, white crystalline substance. Which of the following would be the easiest way to provide data to determine if the substance is an ionic compound?

• Examining the crystals of the substance under a microscope

• Determining the density of the substance

• Testing the electrical conductivity of the crystals

• Testing the electrical conductivity of an aqueous solution of the substance

Tags

NGSS.HS-PS2-5

Which statement explains why metallic solids are excellent conductors of electricity?

• electrons are not able to move in their metallic bonds.

• electrons are able to move in their metallic bonds.

• ions are not able to move when dissolved in water.

• ions are able to move when dissolved in water

Which of the following could be the identity of a white crystalline solid that exhibits the following properties?

-It melts at 320°C.

-It does not conduct electricity as a solid or in aqueous solution.

-It is soft

• C₆H₁₂O₆(s)

• MgCl₂(s)

• Cu(s)

• SiO₂(s)

Which of the following could be the identity of a crystalline solid that exhibits the following properties?

-It melts at 2000°C.

-It is an excellent conductor electricity in all phases.

-It is ductile.

• C₆H₁₂O₆(s)

• MgCl₂(s)

• Cu(s)

• SiO₂(s)

Tags

NGSS.HS-PS2-5

Which substance is the best conductor of electricity?

• NaCl(s)

• NaCl(aq)

• CH₄(s)

• CH₄(aq)

The electrical conductivity of KBr(l) is greater than H₂O(l) because KBr(I) contains mobile

• molecules of H₂O

• ions from H₂O

• molecules of KBr

• ions from KBr

Tags

NGSS.HS-PS2-5