Crystal Lattice & Unit Cell

Unit cell of crystal lattice is define as:

• A molecule in a crystal lattice.
• The smallest repeating unit of a crystal lattice.
• A single atom in a crystal lattice.
• The largest repeating unit of a crystal lattice.

The crystal lattice is defined as:

• A three-dimensional arrangement of atoms, ions, or molecules in a repeating pattern.
• A one-dimensional arrangement of atoms, ions, or molecules in a repeating pattern.
• A random arrangement of atoms, ions, or molecules.
• A two-dimensional arrangement of atoms, ions, or molecules in a repeating pattern.

In unit cell of NaCl, the number of Chloride ions present are:

• 1
• 2
• 3
• 4

In the crystal lattice of NaCl, Each ions present in crystal lattice is surrounded by __ counter ions :

• 10
• 8
• 6
• 4

How many faces are there in Cubic crystal lattice:

• 4
• 8
• 12
• 6

How many edges are present in cubic Crystal lattice

• 8
• 12
• 4
• 6

How many corners are present in cubic Crystal lattice

• 8
• 12
• 4
• 6

In NaCl unit cell, the numbers of sodium & chloride ions present are:

• 2 Na⁺ & 2 Cl^-

• 3 Na⁺ & 3 Cl^-

• 4 Na⁺ & 4 Cl^-

• 6 Na⁺ & 6 Cl^-

Answer explanation

hexagonal close packing has arrangement of atomic layers:

• ABAB

• ABCA

• ABAC

• ABCD

body centered cubic close packing has arrangement of atomic layers:

• ABAB

• ABAC

• ABCA

• ABCD