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Unformatted text preview: chemical bond - attraction between atoms or ions ionic bond- electrostatic forces existing between ions of opposite charge o ions formed when electrons transferred o ionic compounds made from metals and nonmetals covalent bond- sharing of electrons o interactions between nonmetallic elements metallic bond- attraction between metals o each atom bonded to many neighboring atoms o bonding electrons free to move throughout the substance ionic bonding - ions held in 3D array in forming ionic compounds, 1 atom loses an electron while another gains 1 formation of ionic compounds usually exothermic o ionic compounds stable due to attraction of opposite charges o energy released by ion attraction makes up for endothermic ionization lattice energy- energy required to completely separate a mole of ionic compound into its ions o increases as charges on ions increase, radii decrease makes ionic compounds very hard/brittle, w/ high melting points covalent bonds hold atoms in polyatomic ions together, but polyatomic ions as a whole still act as ions...
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- Spring '08