Tuesday, September 17, 2019

Chemistry

chemistry 12th class cbse notes

Packing efficiency in Body-centred cubic structures

Now consider the unit cell of body-centred cubic in which sphere ABCDEFGH are occupied at corner. And sphere c is placed at body-centre of...
chemistry 12th class cbse notes

Packing Efficiency

Packing efficiency is defined as the percentage of total space filled by the constituent particles in a crystal. Packing efficiency in hcp and ccp structures: Let...
chemistry 12th class cbse notes

Close Packed Structures

Close-Packed Structures As we the constituent particles in solid are in form of a sphere. The spheres in solid are arranged in the different way...
chemistry 12th class cbse notes

Primitive unit cell

Primitive unit cell: In a Primitive unit cell, atoms are present at the corner only. An atom is shared by 8 unit cell. Hence the...
chemistry 12th class cbse notes

Characteristics of a Unit Cell

A unit cell is characterized by 6 parameters: 3-edges a, b and c (refer the diagram given above). The edges may or may not...
chemistry 12th class cbse notes

Crystal Lattices and Unit Cells

Crystal Lattices: A crystalline solid consist of a large number of small units, called crystals, each of which possesses a definite geometric shape bounded by...
chemistry 12th class cbse notes

Classification of Crystalline Solid

Classification of Crystalline Solid Molecular solids: Those solids which consist of small molecules are called molecular solids. 1. Non - polar molecular solids: The solids which have...
chemistry 12th class cbse notes

Classification of Solids

Solids are classified on the basis of the arrangement of their constituent particles. Crystalline solids: In a single crystal, the regularity of arrangement of the pattern...
chemistry 12th class cbse notes

States of Matter

Three states of matter are solid, liquid and gas. Amongst them, liquid and gases are called fluids because of their ability to flow. But...