Tag: characteristics

Some important terms

1. Co-ordination number Number of spheres touching one Sphere in a close packed structure is called co-ordination number of a lattice 2. Unit cell The smallest repeating pattern in a crystal lattice is called a unit cell. Characteristics of unit cell Are unit cell has a characteristic dimensions along the three edges a,b,c and interfacial

Continue reading

Family of particles

Quarks Quarks are thought to be elementary point particles like leptons with no internal structure but unlike other particles have fractional charges. Each quark has got either positive or negative charge equal to fraction Of an electrical charge and is assigned a specific quantum number. Original three quarks were labelled as up(u) ,down (d), and

Continue reading

What are the Characteristics of a lone pair ?

What are the characteristics of a lone pair? Characteristics of a lone pair Lone pair are the pair of electrons that do not take part in any chemical bond. They affect the symmetry of molecule or the shape of molecule as they interfere with the other electrons of the molecule . The electrons of lone

Continue reading

What is a racemic mixture?

On the basis of Optical activity the compounds or isomers can be classified into two types:- Those rotate the plane polarised light towards right called the dextro rotatory compounds. Those rotate the plane polarised light towards left are called Laevo rotatory compounds. The equimolar composition of the above two isomers is called racemic mixture.

Atomic Structure

Dalton’s Atomic Theory In 1808 John Dalton published a new system of chemical philosophy in which he propose the following theory :- Matter consist of indivisible atoms. All the atoms of a given element have identical properties. Compounds are formed when atoms of different elements combined in a fixed ratio. Chemical reactions only involve the

Continue reading