This question is about metals.

1. (a)Potassium is an element in Group I of the Periodic Table. Copper is a transition element. State two physical properties of potassium that are different from those of copper. 1 2[2]
2. (b)Complete the diagram in Fig. 2.1 to show the electronic configuration of a potassium ion. Include the charge on the ion. [Figure 2.1][2]
3. (c)Table 2.1 shows the observations when four different metals react with cold water. Table 2.1 metal | observations cerium | bubbles form slowly potassium | bubbles form rapidly uranium | bubbles form very slowly vanadium | no bubbles seen Put the four metals in order of their reactivity. Put the least reactive metal first. least reactive ... most reactive[1]
4. (d)Deduce the number of protons and neutrons in the copper atom shown. ⁶⁵Cu ²⁹ number of protons number of neutrons[2]
5. (e)In the presence of oxygen, copper reacts with sulfuric acid, H₂SO₄, to form copper(II) sulfate and water. Construct the symbol equation for this reaction.[2]
6. (f)(i)Copper can be used as a catalyst. State how a catalyst increases the rate of a chemical reaction.[1]
7. (f)(ii)Name the catalyst used in the Contact process.[1]
8. (g)Give two reasons why copper is used in electrical wiring. 1 2[2]

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