electron structure Flashcards
What is ionic bonding?
Ionic bonding is the electrostatic attraction between positive and negative ions, appearing in ionic compounds.
How do you show ionic bonding?
You show ionic bonding through dot and cross diagrams.
What structure do ionic compounds have?
Ionic compounds have a giant ionic lattice with each ion surrounded by oppositely charged ions.
What do ionic compounds have relatively high BP and MP?
High temperature is required to provide sufficient energy to overcome the strong electrostatic attraction between the ions.
Why does CaO have a higher melting point than Na2O?
CaO has ions with greater charges and therefore stronger electrostatic attraction meaning it will require more energy to overcome the bonds.
How do ionic compounds dissolve in polar solvents?
Polar water molecules will break down the lattice and surround each ion in the solution.
What does the solubility of an ionic compound depend on?
The solubility of an ionic compound is dependent on the electrostatic forces. The larger the difference in charges = stronger the attraction and therefore it will have lower solubility.
Why does an ionic compound only conduct electricity when it is melted or dissolved.
Ionic compounds cannot conduct electricity as a solid because the ions are mobile therefore there are no mobile charge carriers.
When an ionic compound is dissolved or melted, the ions are free to move and are mobile charge carriers therefore can conduct electricity.
