1. Properties of Ionic Compounds
Made of a metal and nonmetal
Crystalline solids with high melting points
Ionic compounds conduct as an aqueous solution…called electrolytes.
Form crystals which break as solids when struck. (See p 215.)
The energy to break one mole of ions , of an ionic compound, is called lattice energy.

2. Namining Acids
When hydrogen is the positive ion the compound is an acid.
H_ or HX where x is an anion.
3 rules for naming acids
Hydro_ic acid (anion ends in ide)
_____ous acid (anion ends in ite)
_____ic acid (anion ends in ate)

3. Metal Properties
Metals exist as metal ions with a free moving sea of electrons.
This gives the properties of malleability, ductility, and electrical conductivity.
These electrons are called delocalized electrons.
An alloy is a mixture of metals.
A substitutional alloy has one or more other metals mixed.
An interstitial alloy is formed by putting small atoms in the spaces of a crystal.

4. Coordination Number Metals and Ionic compounds form crystal patterns.
The number of + around – and – around + are equal and this number is called the coordination number.