First and second Ionization potentials : Ionization potential is the amount of energy required to remove the most loosely held electron from isolated a neutral… Read More »What are First and second Ionization potentials
The elements are arranged in the long periodic table in the increasing order of atomic numbers. Neils Bohr constructed the long form of the periodic… Read More »Long periodic table
Division of elements : According to the electronic configuration of elements, the elements have been classified into four blocks. The basis for this classification is… Read More »Division of elements s, p, d, f block elements
Heisenberg’s Uncertainty principle : “Simultaneous and exact determination of the position and momentum of a sub-atomic particle, like electron moving with high speed is impossible”. If… Read More »Heisenberg’s uncertainty principle
Classification of Elements : The chemical properties of all elements depend upon the electronic configuration. Classification of elements is done upon the basis of complete… Read More »Classification of elements
Cathode ray discharge tube experiment : A cathode ray tube is made of glass containing two thin pieces of metal, called electrodes, sealed in it. The… Read More »Cathode ray tube experiment
Neils Bohr proposed a model of an atom based on atomic spectra of hydrogen. He retained the basic concepts of Rutherford’s model i.e., the atom… Read More »Bohr’s atomic model
Quantum numbers – Definition A set of numbers used to describe an electron completely in an atom are called quantum numbers. Quantum numbers are used… Read More »What are Quantum numbers ?
The postulates of Planck’s quantum theory are The emission of radiation is due to vibrations of charged particles (electrons) in the body. The emission is… Read More »Planck’s quantum theory
Electromagnetic radiation When an electrically charged particle is accelerated alternating electric and magnetic fields are produced and transmitted. These fields are transmitted in the form… Read More »Electromagnetic radiation and its characteristics