by Rajan Gupta | Aug 30, 2020 | Some Important Chemical Compounds
The salts which contain water molecules are known as hydrated salts. For example the crystals of copper sulphate contain five molecules of water called water of crystallization. So the formula of hydrated salt of copper sulphate is CuSO4.5H2O. Water of Crystallization...
by Rajan Gupta | Aug 30, 2020 | Modern Periodic Table
The important advantages of the modern periodic table are given below : This classification is based on the atomic number which is a more fundamental property of the elements. Since this classification is based on the atomic number and not on the atomic mass, the...
by Rajan Gupta | Aug 30, 2020 | Modern Periodic Table
In addition to classifying the elements into s block, p block, d block and f block, the elements can be classified in three categories on the basis of their properties as: (1) Metals (2) Non-metals and (3) Metalloids. Position of Metals on the Periodic Table Metals...
by Rajan Gupta | Aug 30, 2020 | Modern Periodic Table
The elements in which the last electron enters the f-orbitals of their atoms are called f-block elements. These consist of two series of elements placed at the bottom of the periodic table. Lanthanoids or Lanthanides or rare earth metals: The first series follows...
by Rajan Gupta | Aug 30, 2020 | Modern Periodic Table
The elements in which the last electron enters the d-orbitals of their last but one (called penultimate energy level) constitute d-block elements. This block consists of the elements lying between s and p blocks starting from fourth period and onwards. They constitute...
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