IGCSE Chemistry- Electrical conductivity

Electrical conductivity

Electric current is a flow of electrons or Ions

• Electrons have a negative charge
• Ions can have either a negative or positive charge
• Electrons and ions act as charge carriers- they can move charge around a system to create a flow of electricity
• The electric current is the flow of the electrons or ions

Ionic compounds only conduct eletricity when molten or in solution 

• Ionic compounds are made of a lattice of positive and negative ions
• Solid ionic compounds don't conduct elecricity, because their ions aren't free to move around
• When an ionic compound is dissolved the ions seperate and are free to move in solution…