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 interfacialContinue reading “Some important terms”
Tag Archives: characteristics
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), andContinue reading “Family of particles”
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 loneContinue reading “What are the Characteristics of a lone pair ?”
What are the characteristics of pure substances in points?
Here are the characteristics of pure substances They are composed of same kind of particles. Can not be solved into its components by physical method. Have characteristic melting and boiling points. All the particles or the bulk show similar chemical and physical behavior.
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 theContinue reading “Atomic Structure”
The Unconditional Guru 