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Vipin Some Basic Concepts of Chemistry Class 11 Notes Chapter 1 • Importance of Chemistry Chemistry has a direct impact on our life and has wide range of applications in different fields.  These are given below:        (A ) In Agriculture and Food: (i) It has provided chemical fertilizers such as urea, calcium phosphate, sodium nitrate, ammonium phosphate etc. (ii) It has helped to protect the crops from insects and harmful bacteria, by the use ‘ of certain effective insecticides, fungicides and pesticides. (iii) The use of preservatives has helped to preserve food products like jam, butter, squashes etc. for longer periods. (B) In Health and Sanitation: (i) It has provided mankind with a large number of life-saving drugs. Today, dysentery and pneumonia are curable due to discovery of sulpha drugs and penicillin life-saving drugs. Cisplatin and taxol have been found to be very effective for cancer therapy and AZT (Azidothymidine) is used for AIDS victims. (ii) Disinfectants such as p...

Atomic Structure - Discovery of Subatomic Particles.... The Structure of Atom – Electrons, Protons and Neutrons The study about the structure of atom gives a great insight into the entire class of chemical reactions, bonds and their physical properties. The first scientific theory of atomic structure was proposed by John Dalton in 1800s. Table of Content What is Atomic Structure? Atomic Models Dalton’s Atomic Theory Thomson Atomic Model Rutherford Atomic Theory Subatomic Particles Atomic Structure of Isotopes Bohr’s Atomic Theory Dual Nature of Matter FAQs The advances in atomic structure and quantum mechanics have led to the discovery of other fundamental particles. The   discovery of subatomic particles   has been the base for many other discoveries and inventions. What is Atomic Structure? The atomic structure of an element refers to the constitution of its nucleus and the arrangement of the electrons around it. Primarily, the atomic structure of matter is made up of   protons , ele...