IB DP Chemistry Standard Level (2023 syllabus) · IB ib-chem-sl
S1 Structure 1: Models of the particulate nature of matter
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Practice questions on Structure 1: Models of the particulate nature of matter
- Explain why evaporation of a liquid causes the remaining liquid to cool, using ideas about… (4 marks, Explain)
- Explain why atoms of the same element can have different masses, and outline how this affe… (4 marks, Explain)
- Explain why the atomic number of an element uniquely identifies that element, and distingu… (4 marks, Explain / Distinguish)
- Explain why the mass number of an atom is always a whole number, yet the relative atomic m… (4 marks, Explain)
- Explain why the second ionisation energy of sodium is significantly greater than its first… (4 marks, Explain)
- Explain why the first ionisation energy of oxygen is lower than that of nitrogen, even tho… (4 marks, Explain)
- Explain why the first ionisation energy of magnesium is greater than that of aluminium. (4 marks, Explain)
- Explain why the first ionisation energy of calcium is greater than that of potassium, yet … (4 marks, Explain)
- Explain why a real gas behaves more like an ideal gas at high temperature and low pressure… (4 marks, Explain)
- Explain why the volume of a fixed amount of an ideal gas increases when its temperature is… (4 marks, Explain)
- Explain why two different ideal gases, when mixed together in a sealed container at consta… (4 marks, Explain)
- Explain why the volume of an ideal gas doubles when its pressure is halved at constant tem… (4 marks, Explain)
- Explain why the pressure of an ideal gas increases when its temperature is raised at const… (4 marks, Explain)
- Explain how the molecular formula of a compound can be determined from its empirical formu… (4 marks, Explain)
- Explain how the empirical formula of a compound can be determined from its percentage comp… (4 marks, Explain)
- Explain how Avogadro's constant relates the macroscopic scale of measurement (grams) to th… (4 marks, Explain)
- Explain what is meant by the term 'molar mass' and outline how the molar mass of a substan… (4 marks, Explain)
- Explain why chemists use the mole as a unit when working with substances, and state the nu… (4 marks, Explain)
- Explain why the first ionisation energy of chlorine is greater than that of sulfur. (4 marks, Explain)
- Explain why the results of the Geiger–Marsden (gold foil) experiment led to the replacemen… (4 marks, Explain)
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