Octet Rule
All atoms react to achieve noble gas configurations
Importance of noble-gas configurations in forming ions
Ions cannot form without obtaining a noble-gas configuration
Characteristics of an ionic bond
-anions and cations are held together by opposite charges
-have high melting points
-conduct electricity
-dissolve easily in water
-have well defined crystals
Characteristics of ionic compounds
-made up of positive and negative ions
-cation and anion
-metal and nonmetal
Explain the electrical conductivity of melted and of aqueous solutions of ionic compounds.
When melted, the ions can move around, creating electric conduct.
Ionic compounds have good electrical conductivity when in an aqueous solution.
Aqueous solution
A solution in water
Alloy
a mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten.