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Chapter 2 - Covalent Bonding

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Covalent Bond Part II 1 Covalent Bond ãFormed by the sharing of 1 or more pairs of electron. ãBetween two atoms of same or different elements. ãTend to achieve noble gas configuration. ãThe electro-negativity difference usually less than 2.0 2 Lewis structures (i) Single covalent bond When a pair of electron is shared between 2 atoms. Lewis Structure Cl + Cl Cl Cl or Cl Cl An electron pair represented by a pair of dots. It used to show (i) bonding electrons (ii) Lone or nonbonding e
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  1 Covalent Bond Part II  2 Covalent Bond ã Formed by the sharing of 1 or more pairs of electron. ã Between two atoms of same or different elements. ã  Tend to achieve noble gas configuration. ã  The electro-negativity difference usually less than 2.0  3 Lewis structures (i)Single covalent bond When a pair of electron is shared between 2 atoms. Lewis Structure Cl + Cl Cl Cl or Cl Cl An electron pair represented by a pair of dots. It used to show (i) bonding electrons (ii) Lone or nonbonding electron (is not shared)  4 (ii) Double Covalent Bond   Two bonding pairs of electron shared between 2 atoms.   C,N, O and S can form double bonds.   Represented by 2 pairs of dots or 2 short straight lines. 2   O + C O C O or O=C=O
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