Periodic Trends in Properties of Elements
Trends in Physical Properties
There are numerous physical properties of elements such as melting and boiling points, heats of fusion and vaporization, energy of atomization,...
Modern Periodic Table
Modern Periodic table (1913)
Mostly modified Mendeleev’s periodic law. He stated “Physical and chemical properties of elements are the periodic function...
Brief History of the Development of Periodic Table
Dobereiner’s Triads (1829)
Dobereiner classified the elements into groups of three elements with similar properties in such a manner so that the atomic weight of...