U4L4 - Properties of Types of Substances

A sample of a hard, solid compound at room temperature did not conduct electricity as a pure solid but became highly conductive when dissolved in water. Which of the following types of interactions is most likely found between the particles in the substance?

• Ionic bonds

• Metallic bonds

• Covalent bonds

• Hydrogen bonds

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

• It is soft and is a poor thermal and electrical conductor.

• It has a low melting point and is a poor thermal and electrical conductor as a solid.

• It is brittle and water-soluble that is a poor thermal and electrical conductor as a solid.

• It is malleable and is an excellent thermal and electrical conductor as a solid.

Three substances were studied in the laboratory, and the data in the table above were collected. Based on the data, which of the following shows the type of bonding in each substance?

• Substance X: Network covalent; Substance Y: Ionic; Substance Z: Metallic

• Substance X: Ionic; Substance Y: Molecular; Substance Z: Network covalent

• Substance X: Molecular; Substance Y: Network covalent; Substance Z: Metallic

• Substance X: Network covalent; Substance Y: Metallic; Substance Z: Ionic

Molecular solids are made from ______. 

• metals 
• atoms
• sodium
• non-metals 

This type of solid will have the lowest boiling point.

• ionic
• molecular
• network
• metallic

What is the basis of a metallic bond?

• the attraction of neutral metal atoms.
• the attraction between protons and neutrons.
• the attraction between positive metal ions and interlocking electrons.
• the attraction between positive metal ions and free floating electrons.

Electrons that are free to move in metals

• delocalized electrons
• oxidation number
• chemical bond
• salts

What type of bond is illustrated above?

• Metallic

• Ionic

• molecular

• network covalent

A mystery substance has a very high melting point, does not dissolve in water, does not conduct electricity, and is made of non-metals. This substance is very hard. Which type of bonding is most likely to be present?

• Metallic

• Ionic

• Covalent Network

• Covalent Molecular

The following properties are all characteristics of ionic compounds EXCEPT

• high melting and boiling points

• soft

• crystal lattice structure

• conduct electricity when dissolved in water