Question

A regular arrangement of the constituent particles of a crystal in a three-dimensional space is called

• A. Lattice point
• B. Crystal lattice
• C. Unit cell
• D. Isomorphism

Answer 1

The correct option is B Crystal lattice

A regular arrangement of the constituent particles(molecules, atoms or ions) of a crystal in a three-dimensional space is called crystal lattice. It is also called space lattice.
Characteristics of crystal lattice
1. Each point in a crystal lattice represents one constituent particle which may be an atom, a molecule (group of atoms) or an ion.
2. These points in a lattice are called the lattice point or lattice site.
3. Lattice points are joined by straight lines to bring out the geometry of the lattice.

Unit cell is the smallest portion of a crystal lattice which, when repeated in different directions, generates the entire lattice.