Potassium is a Group I element in the Periodic Table. Copper is a transition element. State two physical properties of potassium that differ from those of copper.
Complete Fig. 2.1 to show the electronic configuration of a potassium ion. Remember to include the ion charge.
Table 2.1 shows the observations when four different metals react with cold water. Place the four metals in order of reactivity. Put the least reactive metal first.
Deduce the numbers of protons and neutrons in the copper atom shown, $^{65}_{29}\text{Cu}$.
Copper reacts with sulfuric acid, $\text{H}_2\text{SO}_4$, in the presence of oxygen to produce copper(II) sulfate and water. Construct the symbol equation for this reaction.
State how a catalyst increases the rate of a chemical reaction.
Name the catalyst used in the Contact process.
Give two reasons why copper is used in electrical wiring.