Ionic Bonds

Ionic compounds

- essentially complete electron transfer from an element of low IE (metal) to an element of high electron affinity (EA) (nonmetal)

Na(s) + 1/2 Cl2(g) ? Na+ + Cl-

? NaCl (s)

- NON-DIRECTIONAL bonding

via Coulomb (charge) interaction

- primarily between metals

(Grps 1A, 2A and transition metals)

and nonmetals (esp O and halogens)

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