Question

Choose the option that does not describe the property of a metallic solids:

• A. Metallic solids are good conductors of electricity
• B. There are metallic bonds present in these atoms that are holding them together
• C. Metallic solids can have high melting points
• D. Metalic solid is not a subcategory of crystalline solid

Answer 1

The correct option is D

Metalic solid is not a subcategory of crystalline solid

The explanation for the correct answer:

In the case of option D,

1. Crystalline solids are solids in which atoms, ions, and molecules are arranged in a specific and recurring three-dimensional pattern, forming a crystal lattice that spans in all directions.
2. Ionic solids, molecular solids, covalent-network solids, and metallic solids are the four types of solids.
3. It is not a metallic solid property since we know that metal cations in metallic solids are surrounded by clouds of electrons in a set lattice, making it a crystalline solid.
4. It is vital to note that a metallic link is always non directional because electrons are not shared in one direction with a specific atom.
5. However, electrons are shared in various directions with several neighboring atoms.

The explanation for incorrect answers:

In the case of option A,

1. Metals are a well-organized group of positive ions surrounded and held together by a sea of electrons.
2. These electrons are mobile and are distributed evenly across the crystal lattice.
3. These free and mobile electrons are responsible for metallic materials' strong thermal and electrical conductivities.
4. As a result, metallic solids are excellent electrical conductors.

In the case of option B,

1. In metals, atoms rapidly shed electrons to produce positive ions, or cations, which are surrounded by delocalized electrons.
2. The solid is held together by electrostatic interactions between the ions and the electron cloud, which are known as metallic bonds.
3. As a result, metallic bonds exist to hold the atoms of metallic solids together.

In the case option C,

1. Metallic solids have extremely high melting and boiling temperatures due to strong metallic connections between their atoms.

Therefore, option D is the correct answer.