Crystal Structure | MCQs

Explanation

Explanation

Explanation

Explanation

The property that doesn't typically apply to solids is "Solids have an indefinite volume."

Explanation

NaCl (sodium chloride) is formed by the electrostatic attraction between Na⁺ and Cl⁻ ions.

Such solids are classified as ionic solids due to the presence of ions arranged in a lattice.

Explanation

The body-centered cubic (BCC) unit cell is one of the common arrangements of atoms in crystalline solids. In this structure:

• Eight particles are located at the corners of the cube.
• One particle is situated in the center of the cube.

Explanation

 A space lattice (or crystal lattice) is a three-dimensional array of points arranged in a regular pattern, where each point has identical surroundings.

These points represent the positions of atoms, ions, or molecules in a crystal.

Unit cell: The smallest repeating unit of the lattice that, when repeated in space, builds the entire crystal.

Lattice points: Individual points in the lattice where atoms or molecules can be located.

Motif: The group of atoms associated with each lattice point.

Explanation

In graphite, the carbon atoms are arranged in a hexagonal structure.

Each carbon atom forms three sigma bonds in a planar arrangement.

It creating layers of hexagonally arranged carbon atoms that can slide over one another.

It contributing to graphite's lubricating properties.

Explanation

Whenever crystalline solids are broken, they do so along definite planes known as cleavage planes.

These planes are specific directions in the crystal lattice where the bonds are weaker.

It allowing the crystal to split smoothly.

Explanation

Covalent crystals are hard, frequently brittle materials such as diamond, silicon, and silicon carbide.

In the simpler, monatomic types (e.g., diamond), each atom is surrounded by a number of atoms equal to its valence.