Question:

A solid has a $'bcc?? structure. If the distance of nearest approach between two atoms is $1.73??, the edge length of the cell is

Updated On: Jul 14, 2022
  • $314.20 \,pm$
  • $1.41 \,pm$
  • $200 \,pm$
  • $216 \,pm$
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The Correct Option is C

Solution and Explanation

For bee structure $d=\frac{\sqrt{3}}{2}a$ where $d = $ distance between two atoms $a =$ edge length $1.73=\frac{\sqrt{3}}{2}a$ $a=\frac{2\times1.73}{\sqrt{3}}=2??200\,pm$
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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.