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CHEMICAL
BOND
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CHEMICAL
BOND
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| Chemical
bond can be defined as : " the force of attraction between two atoms or ions that hold them together in a unit is called Chemical Bond". Actually chemical bond is the main factor that makes molecules and compounds. By the interaction of outer electrons, great forces of attraction are developed between two atoms. This force of attraction is called chemical bond. |
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TYPES
OF CHEMICAL BOND
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There are three types of chemical bonds: Ionic
bond or Electrovalent bondCovalent
bondCoordinate
Covalent bond |
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IONIC
BOND OR ELECTROVALENT BOND
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| Chemical bond formed between two atoms due to transfer of electron(s) from one atom to the other atom is called "Ionic bond" or "electrovalent bond". | |||
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EXPLANATION
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| In
ionic bond formation one atom looses electron(s) and the other picks it
up.The atom that looses the electron acquires positive
charge and the other atom which gains the electron becomes a negatively
charged particle. Due to opposite charge an electrostatic
force of attraction is setup between them. This force hold
these atoms together in a unit. This force of attraction is referred to
as "CHEMICAL BOND". |
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FORMATION
OF IONIC BOND BETWEEN Na & Cl
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| Electronic
Configuration of Na is K = 2 , L = 8, M = 1 |
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| For latest information , free computer courses and high impact notes visit : www.citycollegiate.com | |||
| Due
to low ionization potential value, Na-atom loses its valance electron |
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| Electronic
configuration after losing an electron is K = 2, L = 8 , M = 0 |
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Na è Na+
+ e-
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| Due
to loss of one electron Na becomes Na+ -ion. |
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| Electronic
configuration of Cl is K = 2, L = 8, M = 7 |
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| Electron
lost by Na atom picks up by Cl atom. |
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Cl + e- è
Cl-
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| Chlorine
atom is now converted into Cl- ion |
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| We know that positive and negative ions attract each other, therefore an electrostatic force of attraction is set up between Na+ & Cl- ions. This force unites these ions in a unit. In this way ionic bond is formed between Na and Cl atoms which results the formation of sodium chloride. | |||
| For latest information , free computer courses and high impact notes visit : www.citycollegiate.com | |||