Chemistry teacher

  KÖssel–Lewis Approach to Chemical Bonding — NEET  Notes Class 11 CBSE Chemistry: Chemical Bonding and Molecular Structure – Complete Question Bank 1. Basic idea Kössel and Lewis independently explained chemical bonding in 1916 . They were among the first to give a logical explanation of valency . Their explanation was based on the stability/inertness of noble gases . Main idea: Atoms form chemical bonds to achieve a stable electronic configuration , generally similar to that of a noble gas. ⭐ NEET Key Point Atoms tend to achieve a stable outer shell, usually an octet of 8 electrons. 2. Lewis's picture of an atom Lewis divided an atom conceptually into two parts: (a) Kernel The kernel consists of: nucleus inner-shell electrons These inner electrons generally do not participate in bonding . (b) Outer shell The outermost shell contains the valence electrons . Lewis imagined a maximum of 8 electrons in the outer shell. He represented these 8 pos...