Potassium is more reactive than sodium.
Statement 1: The outer electron in a potassium atom is further from the nucleus.
Statement 2: The outer electron in a potassium atom is shielded by more inner shells of electrons.
Statement 3: A potassium atom has more protons, so its outer electron is attracted more strongly.
Statement 4: The intermolecular forces in potassium are weaker than in sodium.
Which statements help to explain why potassium is more reactive than sodium?
1 and 2 only
1, 2 and 3 only
2 and 4 only
1, 2 and 4 only
60 exam-style questions on OCR GCSE Chemistry 4.1 Predicting chemical reactions, covering 4.1.1 Properties and trends in Groups 1, 7 and 0, 4.1.2 Properties of the transition metals, 4.1.3 Reactivity predicted from position in the Periodic Table, and 4.1.4 Reactivity of metals and the reactivity series. Each one has a worked solution and a mark scheme showing where the marks go.