This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
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...
View Full Document
This document was uploaded on 10/30/2011 for the course CHEM 161 at Rutgers.
- Spring '08