Endothermic
Energy is absorbed; (+)
Exothermic
Energy is released; (-)
What is the charge of an ionic bond?
Exothermic; energy is released in the formation of an ionic bond.
Lattice energy
Energy required to combine separate, gaseous atoms into a crystal lattice
Trend for lattice energy and strength of attraction?
The larger the magnitude of lattice energy, the stronger the force of attraction
How does size of ions relate to lattice energy?
The smaller the ions, the more energy between the nucleus and valence electrons. Thus more lattice energy in smaller ions.
How does lattice energy relate to charge of the ion?
The larger the positive or negative charge, the more negative lattice energy.
What two requirements are there for an ionic compound to be valid?
The formula must be neutral (charge=0) and empirical (lowest whole number ratio; ions)