Question:

A metal crystallises into a lattice containing a sequence of layers as $AB\, AB\, AB$ ... . What percentage of voids are left in the lattice?

Updated On: Jun 7, 2022
  • 0.72
  • 0.48
  • 0.26
  • 0.32
Hide Solution
collegedunia
Verified By Collegedunia

The Correct Option is C

Solution and Explanation

$ABAB$ packing is hexagonal closepacking in which all atoms occupy $74\%$ of the total space. Hence, $26\%$ of voids are left in the lattice.
Was this answer helpful?
0
0

Concepts Used:

Solid State

Solids are substances that are featured by a definite shape, volume, and high density. In the solid-state, the composed particles are arranged in several manners. Solid-state, in simple terms, means "no moving parts." Thus solid-state electronic devices are the ones inclusive of solid components that don’t change their position. Solid is a state of matter where the composed particles are arranged close to each other. The composed particles can be either atoms, molecules, or ions. 

Solid State

Types of Solids:

Based on the nature of the order that is present in the arrangement of their constituent particles solids can be divided into two types;

  • Amorphous solids behave the same as super cool liquids due to the arrangement of constituent particles in short-range order. They are isotropic and have a broad melting point (range is about greater than 5°C).
  • Crystalline solids have a fixed shape and the constituent particles are arranged in a long-range order.