Chemical Bonding and Molecular Structure
Chemical bond:
Chemical bond is the attractive force, which holds various constituents (such as atoms, ions) together in different chemical species.
Octet rule:
Atoms tend to gain, lose, or share electrons so as to have eight electrons in their valence shells.
Lewis dot Structure:
Representation of molecules and ions in terms of the shared pairs of electrons and the octet rule
CO32-→
NO2-→
HNO3 →
Formal charge:
Lewis structure of O3→
F.C. on the O-1
F.C. on the O-2
F.C. on the O-3
Limitations of the octet rule:
- Incomplete octet of the central atom
E.g. BeH2, LiCl, BCl3
- Odd electron molecules
E.g. NO, NO2
- Expanded octet
E.g. PF5…
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