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## Class 12 Chemistry (India)

### Course: Class 12 Chemistry (India) > Unit 1

Lesson 4: Packing and packing efficiency in cubic cells- What is Packing fraction / packing efficiency of Unit Cells ?
- Calculation of Packing Fraction of cubic Unit Cells
- Identifying the relation between the radius of an atom and the edge length of a unit cell.
- Calculating the simplest formula for a given cubic crystal.
- Packing Efficiency

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# What is Packing fraction / packing efficiency of Unit Cells ?

In this video, we try to understand what packing fraction and packing efficiency means and see how we can use the effective number of atoms to figure out the packing fraction of unit cells.
Created by Moumita Sen.