Question

chemical bonding notes please class 11




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Answer 1

Answer:

Chemical Bonding and Molecular Structure Class 11 Notes Chemistry Chapter 4

• Chemical Bond

The force that holds different atoms in a molecule is called chemical bond.

• Octet Rule

Atoms of different elements take part in chemical combination in order to complete their octet or to attain the noble gas configuration.

• Valence Electrons

It is the outermost shell electron which takes part in chemical combination.

• Facts Stated by Kossel in Relation to Chemical Bonding

— In the periodic table, the highly electronegative halogens and the highly electro-positive alkali metals are separated by noble gases.

— Formation of an anion and cation by the halogens and alkali metals are formed by gain of electron and loss of electron respectively.— Both the negative and positive ions acquire the noble gas configuration.

— The negative and positive ions are stabilized by electrostatic attraction Example,

chemical-bonding-and-molecular-structure-cbse-notes-for-class-11-chemistry-1

• Modes of Chemical Combination

— By the transfer of electrons: The chemical bond which formed by the complete transfer of one or more electrons from one atom to another is termed as electrovalent bond or ionic bond.

— By sharing of electrons: The bond which is formed by the equal sharing of electrons between one or two atoms is called covalent bond. In these bonds electrons are contributed by both....