(a)[2]
Complete the table so it shows the electrical conductivity of solid graphite and solid potassium.
(b)[1]
Give one item from the table that indicates iodine is a simple covalent substance.
(c)[2]
What in the table shows that zinc chloride is an ionic compound?
(d)[2]
Predict the products formed at the positive electrode (anode) and the negative electrode (cathode) in this electrolysis.
(e)[1]
Use ideas about reactivity to explain why this reaction takes place.