3.3 - Ionic Bonding
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ions
atoms that have lost or gained electron(s)
cation
positive ion
metal atoms lose electrons to
become positively charged ions
nonmetal atoms gain electrons to
become negatively charged ions
anion
negative ion
group five ion charges
-3
group six ion charges
-2
group seven ion charges
-1
compounds have
no overall charge - ions cancel out
ionic bonding in terms of electrostatic attractions
held together by strong electrostatic forces of attraction between oppositely charged ions
why compounds with giant ionic lattices have high MP/BP
• strong electrostatic forces of attraction between oppositely charged ions • requires lots of energy to overcome
ionic compounds only conduct electricity when molten/aqueous solution
solid - ions fixed molten/aqueous - ions free to move, carrying charge