Discovery of Protons and Neutrons

  Discovery of Protons and Neutrons Discovery of Protons and Neutrons Electrical discharge carried out in the modified cathode ray tube led to the discovery of canal rays carrying positively charged particles. The characteristics of these positively charged particles are listed below. (i) Unlike cathode rays, mass of positively charged particles depends upon the nature … Read more

Discovery of Electron

Discovery of Electron Discovery of Electron In 1830, Michael Faraday showed that if electricity is passed through a solution of an electrolyte, chemical reactions occurred at the electrodes, which resulted in the liberation and deposition of matter at the electrodes. These results suggested the particulate nature of electricity. In mid 1850s many scientists mainly Faraday … Read more

IMPORTANCE OF CHEMISTRY

  IMPORTANCE OF CHEMISTRY IMPORTANCE OF CHEMISTRY Chemistry plays a central role in science and is often intertwined with other branches of science. Principles of chemistry are applicable in diverse areas, such as weather patterns, functioning of brain and operation of a computer, production in chemical industries, manufacturing fertilisers, alkalis, acids, salts, dyes, polymers, drugs, … Read more

Development of chemistry

 “Chemistry is the science of molecules and their transformations. It is the science not so much of the one hundred elements but of the infinite variety of molecules that may be built from them.”- Roald Hoffmann Development of chemistry Development of chemistry Chemistry, as we understand it today, is not a very old discipline. Chemistry … Read more

Main Branches of Chemistry

 Main Branches of Chemistry  Chemistry is a branch of science which deals with the study of composition of matter and chemical changes involved in it. Main Branches of Chemistry Main Branches of Chemistry :- 1. In Organic Chemistry: It gives us knowledge about elements and their compounds. 2. Organic Chemistry:  It gives us knowledge about the … Read more

Beryllium (Be)

  Beryllium (Be) Beryllium (Be) Latin name: Beryllium  English name: Beryllium Year discovered: 1798 Discovered by: Louis-Nicolas Vauquelin Cost per 100 grams: 85.7 USD Electron shell: K2 L2 M0 N0 O0 P0 Q0 R0 Electrons: 4 Protons: 4 Neutrons: 5 Atomic number: 4 Atomic weight (Relative atomic mass): 9.0121 (g/mol) Density: 1.848 (g/cm³) Melting point: … Read more

Hydrogen (H)

  H Hydrogen  1.00784 (g/mol) Latin name: Hydrogenium English name: Hydrogen Year discovered: 1766 CAS Number: CAS1333-74-0 Discovered by: Henry Cavendish Cost per 100 grams: 12 USD Electron shell: K1 L0 M0 N0 O0 P0 Q0 R0 Electrons: 1 Protons: 1 Neutrons: 0 Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of 1.00794 … Read more

Chemical Reactions and Equations

   Chemical Reactions and Equations  Chemical Reactions and Equations A complete chemical equation represents the reactants, products and their physical states symbolically. A chemical equation is balanced so that the numbers of atoms of each type involved in a chemical reaction are the same on the reactant and product sides of the equation. Equations must … Read more