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Flashcards in Ionic Bonding And Structure Deck (8)
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What is the definition of ionic bonding

Electrostatic attraction between positive and negative ions. Hold together actions and anions in ionic compounds


How to draw dot and cross diagrams

Outer shell electrons from a metal atom are transferred to the outer shell of the non metal atom, forming + and - ions


Structure of ionic compounds

Giant ionic lattice.
Each + ion is surrounded by 6 - ion


What is a giant ionic lattice

A structure containing billions of ions


Properties of ionic compounds

High melting and boiling points
Soluble in polar solvent
Conductor of electricity in aqueous or molten ionic compounds


Why do ionic compounds have a high melting and boiling point?

A large amount of energy is needed to overcome the strong electrostatic attraction.
Lattices that have ions with greater ionic charge have a higher melting point


Why are ionic bonds soluble in polar solvents?

Polar water molecules break down lattice, surround each ion in solution.
Depends on relative strengths of the attractions within the giant ionic lattice and the attractions between ions and water molecules.


Why are ionic compounds conductors when aqueous or molten

When solid, they are in a fixed ionic lattice and there are no mobile charge carriers
When aqueous or molten, the solid ionic lattice breaks down, ions are free to move as mobile charge carriers