Ionic bonding & ionic compounds

Explain what ionic bonding is.

A metal and a non-metal react, A metal loses electrons to form a positive ion and the non-metal gains that electron to form a negatively charged ion. The oppositely charged ions are strongly attracted by electrostatic forces.

How are ionic bonded elements shown?

Dot and cross diagram

What are 3 problems with the dot and cross diagram?

Don’t show the structure of the compound, size of the ions or how they are arranged

Draw a dot and cross diagram for Magnesium chloride ( MgCl₂) with only the outer shells

What structure do ionic compounds form?

Giant ionic lattice

Explain the properties and what an giant ionic lattice is.

The ions form a closely packed regular lattice arrangement with very strong electrostatic forces of attraction between the oppositely charged ions in all directions of the lattice

What are the properties of ionic compounds?

• High mot and bot’s due to strong bonds between ions that require a lot of energy to break

• Cannot conduct electricity as solids as ions are held in place

• Can conduct electricity as a liquid when ions are free to move

Find the empirical formula of the ionic compound in the image.